Activities and Programs

The activities below are offered by a variety of organizations and their dedicated volunteers. All programs are FREE unless noted below. Programs led by IRC-Certified Volunteers require pre-registration, which closes at 4 p.m. on the day prior to the event.  No walk-up registrations will be permitted for these events. For policies of other organizations, please use the sign-up information provided. For mobility device policies click here.

    Note: Minors must be accompanied by a parent or guardian for these events. For programs requiring online registration, each adult and child must be registered.

Need help? For the fastest answers, look for organization-specific contact information in each event listing (click More Information for full listing). If no contact information is listed, email info@irconservancy.org for assistance.

Click here to learn more about IRC-Certified Volunteers.    •   Click here to learn more about the Difficulty Ratings.

Sunday, September 25, 2022

Bommer Canyon East Fork and Ridge Route Loop Hike

Hiking & Fitness
Bommer Canyon East Fork and Ridge Route Loop Hike

Experience the serenity of Bommer Canyon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon East Fork and Ridge Route Loop Hike
Date:
Sun, 09/25/2022
Time:
4:30 PM - 7:00 PM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
Registration has closed.
More Information  

Sunday, October 2, 2022

Bommer Canyon East Fork and Ridge Route Loop Hike

Hiking & Fitness
Bommer Canyon East Fork and Ridge Route Loop Hike

Experience the serenity of Bommer Canyon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon East Fork and Ridge Route Loop Hike
Date:
Sun, 10/02/2022
Time:
4:00 PM - 6:30 PM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
17 of 20
More Information  

Tuesday, October 4, 2022

Distance Hike: Bommer to the Sea

Hiking & Fitness
Distance Hike: Bommer to the Sea

Join us for a challenging and beautiful hiking adventure to the sea and back. Hiking distance is up to 14 miles and is designed for advanced hikers. Participants must be physically fit and have distance hiking experience. Singletrack trails, steep climbs and descents are numerous on this route, with approximately 2400 feet of accumulated climbing elevation. Beginning in Bommer, the hike will head into Crystal Cove State Park, then pass through Laguna Coast Wilderness Park before returning to the Irvine preserve.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-5 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Distance Hike: Bommer to the Sea
Date:
Tue, 10/04/2022
Time:
7:00 AM - 1:00 PM
Where:
Bommer Canyon
Difficulty Rating:
5
Distance:
14 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 09/26/2022
More Information  

Friday, October 7, 2022

Bommer Canyon Exploration Day

Special Events
Bommer Canyon Exploration Day

Enjoy self-guided access in the southern portion of Irvine’s Open Space Preserve. The entire southern Open Space Preserve trail network will be open for self-guided hiking and biking from 8 am to 1 pm. This includes the single-tracks in Shady Canyon and Bommer Canyon that are reserved for guided activities only. Registration is required for this event. The Bommer Canyon Cattle Camp will be available for parking, but please take note that your vehicle must be removed from the Cattle Camp area by 1 pm.

Special Notice: Parking at the Bommer Canyon Cattle Camp is extremely limited due to ongoing construction, and will be available on a first come-first serve basis. Additional parking may be available at the Bommer Canyon Trailhead and Turtle Rock Community Park. Alternate parking options also include the Quail Hill Trailhead, Quail Hill Community Center and Laguna Coast Wilderness Park.

Bommer Canyon Exploration Day
Date:
Fri, 10/07/2022
Time:
8:00 AM - 1:00 PM
Where:
Bommer Canyon
Difficulty Rating:
Variable
Distance:
Variable
Minimum Age:
All Ages
Family Friendly:
Yes
Spaces Left:
Registration for this event opens at 8:00am on 09/29/2022
More Information  

Saturday, October 8, 2022

Bommer Canyon East Fork and Ridge Route Loop Hike

Hiking & Fitness
Bommer Canyon East Fork and Ridge Route Loop Hike

Experience the serenity of Bommer Canyon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon East Fork and Ridge Route Loop Hike
Date:
Sat, 10/08/2022
Time:
8:00 AM - 10:30 AM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
Registration for this event opens at 8:00am on 09/30/2022
More Information  

Sunday, October 9, 2022

Bommer Canyon Full Moon Hike

Hiking & Fitness
Bommer Canyon Full Moon Hike

Experience the serenity of Bommer Canyon under a full moon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic sunset views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level 3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon Full Moon Hike
Date:
Sun, 10/09/2022
Time:
6:00 PM - 8:30 PM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
Registration for this event opens at 8:00am on 10/01/2022
More Information  

Monday, October 10, 2022

Monday Morning Super Trek: Bommer Canyon and Crystal Cove

Hiking & Fitness
Monday Morning Super Trek: Bommer Canyon and Crystal Cove

Come start your week with us on our Super Treks in the Irvine Open Space Preserve. Join us as we explore Bommer Canyon and Crystal Cove State Park. After hiking up to Bommer Ridge, we drop down and loop through Crystal Cove State Park. Along the way, we will be rewarded with views of the ocean and spectacular canyons. There will be several steep ascents and descents.

Participants must be able to hike 11 miles with an elevation gain of 1800 feet at an average moving rate of 3 miles per hour. All participants must carry their own water! Please come prepared with a pack, plenty of water, snacks, sturdy closed-toe hiking shoes or boots, sunscreen, first aid, and all other supplies to keep you safe and healthy on the trail. Under-prepared participants may be denied access to the event!

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-4 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Monday Morning Super Trek: Bommer Canyon and Crystal Cove
Date:
Mon, 10/10/2022
Time:
7:30 AM - 12:30 PM
Where:
Bommer Canyon
Difficulty Rating:
4
Distance:
11 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 10/02/2022
More Information  

Saturday, October 15, 2022

Wilderness Access Day: Bommer Canyon

Special Events
Wilderness Access Day: Bommer Canyon

Enjoy self-guided access in the southern portion of Irvine’s Open Space Preserve. The entire southern Open Space Preserve trail network will be open for self-guided hiking and biking from 8 am to 2 pm. This includes the single-tracks in Shady Canyon and Bommer Canyon that are reserved for guided activities only. Registration is not required for this event, though it is shown on the website. If you need driving directions, please use the online registration to receive a map and instructions for getting to Bommer. The Bommer Canyon Cattle Camp will be available for parking, but please take note that your vehicle must be removed from the Cattle Camp area by 2 pm.

Special Notice: Parking at the Bommer Canyon Cattle Camp is extremely limited due to ongoing construction, and will be available on a first come-first serve basis. Additional parking may be available at the Bommer Canyon Trailhead and Turtle Rock Community Park. Alternate parking options also include the Quail Hill Trailhead, Quail Hill Community Center and Laguna Coast Wilderness Park.

Wilderness Access Day: Bommer Canyon
Date:
Sat, 10/15/2022
Time:
8:00 AM - 2:00 PM
Where:
Bommer Canyon
Difficulty Rating:
Variable
Distance:
Variable
Minimum Age:
All Ages
Family Friendly:
Yes
Spaces Left:
183 of 200
More Information  

Tuesday, October 18, 2022

Bommer Canyon to Butterfly Valley Hike

Hiking & Fitness
Bommer Canyon to Butterfly Valley Hike

Join us as we explore the Irvine Open Space Preserve on this hike through Bommer and Shady Canyons. We’ll begin at the Cattle Camp, where ranch equipment of old still stands. After a steep ascent on the East Fork trail, we’ll make our way across part of Serrano Ridge and descend into Shady Canyon to the Butterfly Valley trail. Here, you’ll experience some of the most mature Coastal Sage Scrub in all of Orange County. After a short stop we’ll return the same way. Total round trip distance is 8 miles with an elevation gain of 1500 feet at an average moving rate of 2.5 miles per hour. All participants must carry their own water! Please come prepared with a pack, plenty of water, snacks, sturdy closed-toe hiking shoes or boots, sunscreen, first aid, and all other supplies to keep you safe and healthy on the trail. Under-prepared participants may be denied access to the event!

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-4 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon to Butterfly Valley Hike
Date:
Tue, 10/18/2022
Time:
8:00 AM - 12:30 PM
Where:
Bommer Canyon
Difficulty Rating:
4
Distance:
8 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 10/10/2022
More Information  

Saturday, October 22, 2022

Bommer Canyon East Fork and Ridge Route Loop Hike

Hiking & Fitness
Bommer Canyon East Fork and Ridge Route Loop Hike

Experience the serenity of Bommer Canyon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon East Fork and Ridge Route Loop Hike
Date:
Sat, 10/22/2022
Time:
8:00 AM - 10:30 AM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
Registration for this event opens at 8:00am on 10/14/2022
More Information  

Sunday, October 23, 2022

Bommer Canyon East Fork and Ridge Route Loop Hike

Hiking & Fitness
Bommer Canyon East Fork and Ridge Route Loop Hike

Experience the serenity of Bommer Canyon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon East Fork and Ridge Route Loop Hike
Date:
Sun, 10/23/2022
Time:
4:00 PM - 6:30 PM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
Registration for this event opens at 8:00am on 10/15/2022
More Information  

Wednesday, October 26, 2022

Distance Hike: Bommer and Beyond

Hiking & Fitness
Distance Hike: Bommer and Beyond

Grab your day pack and join us on a distance hike through scenic Bommer Canyon and beyond into Laguna Coast and Crystal Cove Parks. We stage at Cattle Camp, historically a center for cattle operations that occurred in the San Joaquin Hills up until the late 1990s, and now part of the Irvine Open Space Preserve. This hike involves multiple steep climbs and descents across a variety of trail types, including some narrow singletracks, with 2200+ feet of accumulated climbing elevation, but is done at a moderate pace, approximately 3 mph. Please bring plenty of water (100 oz. recommended), and wear sturdy hiking shoes. Hiking distance is 10-12 miles.

All participants must carry their own day pack and water! Please come prepared with a pack, sturdy closed-toe hiking shoes or boots, sunscreen, first aid, and all other supplies to keep you safe and healthy on the trail for the half-day of being out in the wilderness area. Under-prepared participants may be denied access to the event! Program may be cancelled or shortened due to adverse weather conditions.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-4 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Distance Hike: Bommer and Beyond
Date:
Wed, 10/26/2022
Time:
7:00 AM - 12:00 PM
Where:
Bommer Canyon
Difficulty Rating:
4
Distance:
12 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 10/18/2022
More Information  

Thursday, October 27, 2022

Thursday Morning Trek: Bommer Canyon

Hiking & Fitness
Thursday Morning Trek: Bommer Canyon

This week in the Irvine Open Space Preserve, we’ll be in Bommer Canyon, once part of the historic Irvine cattle ranch where corrals and ranch equipment still stand. The hike is a seven-mile loop with some climbing but rewards you with fantastic views overlooking the ocean and many Irvine locales. Please bring water, a trail snack, sunscreen, a hat, and any other necessary equipment to keep you safe on the trail.   Get your boots out and register to hike the loop through the Laguna Coast Wilderness and back to Cattle Camp.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Thursday Morning Trek: Bommer Canyon
Date:
Thu, 10/27/2022
Time:
8:00 AM - 11:30 AM
Where:
Bommer Canyon
Difficulty Rating:
4
Distance:
7 miles
Minimum Age:
16
Spaces Left:
Registration for this event opens at 8:00am on 10/19/2022
More Information  

Saturday, October 29, 2022

Bommer Canyon East Fork and Ridge Route Loop Hike

Hiking & Fitness
Bommer Canyon East Fork and Ridge Route Loop Hike

Experience the serenity of Bommer Canyon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon East Fork and Ridge Route Loop Hike
Date:
Sat, 10/29/2022
Time:
8:00 AM - 10:30 AM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
Registration for this event opens at 8:00am on 10/21/2022
More Information  

Sunday, October 30, 2022

Distance Hike: Bommer Canyon

Hiking & Fitness
Distance Hike: Bommer Canyon

The title says it all. This is your chance to venture deep in the Irvine Open Space Preserve. Join us for a challenging and beautiful adventure. Hiking distance is up to 14 miles and is designed for advanced hikers. Participants must be physically fit and have distance hiking experience. Singletrack trails, steep climbs and descents are numerous on this route, with over 2,400 feet of accumulated climbing elevation. Most months, the route stays in the Irvine Open Space Preserve for its entirety, but will occasionally feature hiking to the sea and back: beginning in Bommer, the hike will head into Crystal Cove State Park, then pass through Laguna Coast Wilderness Park before returning to the Irvine preserve.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-5 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Distance Hike: Bommer Canyon
Date:
Sun, 10/30/2022
Time:
7:00 AM - 1:00 PM
Where:
Bommer Canyon
Difficulty Rating:
5
Distance:
14 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 10/22/2022
More Information  

Bommer Canyon East Fork and Ridge Route Loop Hike

Hiking & Fitness
Bommer Canyon East Fork and Ridge Route Loop Hike

Experience the serenity of Bommer Canyon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon East Fork and Ridge Route Loop Hike
Date:
Sun, 10/30/2022
Time:
4:00 PM - 6:30 PM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
Registration for this event opens at 8:00am on 10/22/2022
More Information  

Sunday, November 6, 2022

Bommer Canyon East Fork and Ridge Route Loop Hike

Hiking & Fitness
Bommer Canyon East Fork and Ridge Route Loop Hike

Experience the serenity of Bommer Canyon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon East Fork and Ridge Route Loop Hike
Date:
Sun, 11/06/2022
Time:
3:00 PM - 5:30 PM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
Registration for this event opens at 8:00am on 10/29/2022
More Information  

Tuesday, November 8, 2022

Bommer Canyon Full Moon Hike

Hiking & Fitness
Bommer Canyon Full Moon Hike

Experience the serenity of Bommer Canyon under a full moon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic sunset views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level 3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon Full Moon Hike
Date:
Tue, 11/08/2022
Time:
4:30 PM - 7:00 PM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
Registration for this event opens at 8:00am on 10/31/2022
More Information  

Saturday, November 12, 2022

Bommer Canyon East Fork and Ridge Route Loop Hike

Hiking & Fitness
Bommer Canyon East Fork and Ridge Route Loop Hike

Experience the serenity of Bommer Canyon during this moderate-paced hike in the Irvine Open Space Preserve. We’ll experience mature coastal sage scrub and fantastic views overlooking the city of Irvine and the hillsides to the north. This hike is just over 3 miles and includes 700 feet of total climbing elevation with several very steep inclines. The steepest section ascends 300 feet in a quarter-mile. Participants must be in good physical condition.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering.

Bommer Canyon East Fork and Ridge Route Loop Hike
Date:
Sat, 11/12/2022
Time:
8:00 AM - 10:30 AM
Where:
Bommer Canyon
Difficulty Rating:
3
Distance:
3 miles
Minimum Age:
12
Spaces Left:
Registration for this event opens at 8:00am on 11/04/2022
More Information  
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