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, December 15, 2019

CANCELLED due to Trail Conditions: Limestone Canyon Photography Truck Tour

Interpretive

Join us on a backcountry wilderness driving tour filled with great sightseeing and photographic opportunities. Our journey begins at the Hicks Haul Staging Area, where you will board the back of an open-air, ten-seat, 4-wheel drive vehicle for a tour of Limestone Canyon.
 We will stop occasionally for 10-15 minutes or so to admire the […]

CANCELLED due to Trail Conditions: Limestone Canyon Photography Truck Tour
Date:
Sun, 12/15/2019
Time:
8:00 AM - 2:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
2
Distance:
16 miles
Minimum Age:
18
Spaces Left:
Full
More Information  

CANCELLED due to Trail Conditions: Afternoon Adult Beginner Mountain Bike Ride: Limestone Canyon to The Sinks

Mountain Biking

A slow-paced beginner mountain bike ride for adults in Limestone Canyon through sycamores, oaks, and habitat native to California. The route takes us to The Sinks, Orange County’s own mini “Grand Canyon.” Along the way, we will stop and talk about the local habitat, and hope to see some of our local native animals and […]

CANCELLED due to Trail Conditions: Afternoon Adult Beginner Mountain Bike Ride: Limestone Canyon to The Sinks
Date:
Sun, 12/15/2019
Time:
2:00 PM - 4:30 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
Variable
Distance:
8 miles
Minimum Age:
18
Spaces Left:
Full
More Information  

Thursday, December 19, 2019

Intermediate Evening Mountain Bike Ride

Mountain Biking

Explore Limestone Canyon by night on this intermediate mountain bike night ride. We will ride out of Augustine, up Loma Ridge, down to The Sinks, and along Limestone Ridge or Limestone Valley, depending on the group. Please plan for a distance between 10-12 miles. Please arrive early as it will get dark quickly. Trails include […]

Intermediate Evening Mountain Bike Ride
Date:
Thu, 12/19/2019
Time:
5:30 PM - 7:30 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
13 miles
Minimum Age:
18
Spaces Left:
Full
More Information  

Friday, December 20, 2019

Weekday Slow-Paced Mountain Bike Ride: Limestone Canyon

Mountain Biking

Enjoy the relaxation of riding in the wilderness on empty trails and join us on this docent led mountain bike ride through Limestone Canyon. We will visit Dripping Springs which is a fern covered, year-round source of water for the local wildlife. The ride will also stop at the west viewing deck for the Sinks […]

Weekday Slow-Paced Mountain Bike Ride: Limestone Canyon
Date:
Fri, 12/20/2019
Time:
8:30 AM - 11:00 AM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
3
Distance:
13 miles
Minimum Age:
14
Spaces Left:
1 of 15
More Information  

The Lure and Lull of Limestone Canyon and The Sinks Equestrian Ride or Dripping Springs

Equestrian
equestrian horses

Take a leisurely equestrian ride through beautiful Limestone Canyon, home of oak woodlands, grasslands, and coastal sage scrub.  View evidence of the old ranch days when cattle once roamed the area, and see plants that are native to our area.  You will be touring the beautiful Natural Landmarks. Reviewing the 1-through-5 Difficulty Ratings will help […]

The Lure and Lull of Limestone Canyon and The Sinks Equestrian Ride or Dripping Springs
Date:
Fri, 12/20/2019
Time:
10:00 AM - 2:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
3
Distance:
8 miles
Minimum Age:
16
Spaces Left:
8 of 12
More Information  

Saturday, December 28, 2019

Slow-Paced Mountain Bike Ride: Limestone Canyon, Loma Ridge to The Sinks

Mountain Biking

Join us in beautiful Limestone Canyon on this docent-led mountain bike ride beneath a canopy of coastal live oaks up to beautiful vistas and the viewing deck of The Sinks. This is a slow-paced ride designed for the intermediate rider who is in excellent cardio shape and physically fit.   The rider should have experience […]

Slow-Paced Mountain Bike Ride: Limestone Canyon, Loma Ridge to The Sinks
Date:
Sat, 12/28/2019
Time:
8:00 AM - 10:30 AM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
10.5 miles
Minimum Age:
18
Spaces Left:
Full
More Information  

Monday, December 30, 2019

Hike to East Sinks Viewing Deck: Limestone Canyon

Hiking & Fitness

Come along with us on this fast-paced morning hike through beautiful Limestone Canyon Nature Preserve to the East Sinks Viewing Deck. You’ll be rewarded with a spectacular view of The Sinks as well as sweeping views of Orange County and the Santa Ana Mountains. This hike involves steep climbs and descents on both double and […]

Hike to East Sinks Viewing Deck:  Limestone Canyon
Date:
Mon, 12/30/2019
Time:
7:30 AM - 11:30 AM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
10 miles
Minimum Age:
18
Spaces Left:
Full
More Information  

Sunday, January 5, 2020

Intermediate Mountain Bike Ride from Irvine to Limestone Canyon

Mountain Biking

We start our ride on the paved Hicks Haul Road, the extension of Jeffrey Rd north of Portola Pkwy. As we warm up on the climb to the top of the road, we enjoy increasingly beautiful views over Irvine. We then follow Loma Ridge to the East, with fantastic vistas of Orange County, the surrounding […]

Intermediate Mountain Bike Ride from Irvine to Limestone Canyon
Date:
Sun, 01/05/2020
Time:
8:00 AM - 11:30 AM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
16 miles
Minimum Age:
18
Spaces Left:
6 of 15
More Information  

Monday, January 6, 2020

The Lure and Lull of Limestone Canyon and The Sinks Equestrian Ride or Dripping Springs

Equestrian
equestrian horses

Take a leisurely equestrian ride through beautiful Limestone Canyon, home of oak woodlands, grasslands, and coastal sage scrub.  View evidence of the old ranch days when cattle once roamed the area, and see plants that are native to our area.  You will be touring the beautiful Natural Landmarks. Reviewing the 1-through-5 Difficulty Ratings will help […]

The Lure and Lull of Limestone Canyon and The Sinks Equestrian Ride or Dripping Springs
Date:
Mon, 01/06/2020
Time:
10:00 AM - 2:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
3
Distance:
8 miles
Minimum Age:
16
Spaces Left:
12 of 12
More Information  

Wednesday, January 8, 2020

Mid-Week Hike: Agua Chinon and The Sinks

Hiking & Fitness

Recharge your batteries with a refreshing mid-week hike through the Agua Chinon Wash in Limestone Canyon Nature Preserve. This hike will visit The Sinks and other possible destinations such as Box Springs, Loma Ridge, Limestone Ridge and Limestone Canyon. This hike involves multiple steep climbs and descents, with 2100+ feet of accumulated climbing elevation, but is […]

Mid-Week Hike: Agua Chinon and The Sinks
Date:
Wed, 01/08/2020
Time:
8:00 AM - 1:00 PM
Where:
Irvine Open Space Preserve
Difficulty Rating:
4
Distance:
12 miles
Minimum Age:
18
Spaces Left:
16 of 20
More Information  

Thursday, January 9, 2020

Intermediate Evening Mountain Bike Ride

Mountain Biking

Explore Limestone Canyon by night on this intermediate mountain bike night ride. We will ride out of Augustine, up Loma Ridge, down to The Sinks, and along Limestone Ridge or Limestone Valley, depending on the group. Please plan for a distance between 10-12 miles. Please arrive early as it will get dark quickly. Trails include […]

Intermediate Evening Mountain Bike Ride
Date:
Thu, 01/09/2020
Time:
5:00 PM - 7:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
13 miles
Minimum Age:
18
Spaces Left:
10 of 15
More Information  

Friday, January 10, 2020

Distance Hike: Limestone Canyon

Hiking & Fitness

Join us for a scenic, fast-paced, challenging, distance hike in the beautiful Limestone Canyon Nature Preserve. This hike is for physically fit hikers who enjoy the challenge of multiple steep climbs and descents. This 10–12 mile hike offers sweeping views of Orange County and the Santa Ana Mountains as well as possible wildlife sightings. Depending […]

Distance Hike: Limestone Canyon
Date:
Fri, 01/10/2020
Time:
7:15 AM - 12:15 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
12 miles
Minimum Age:
18
Spaces Left:
14 of 20
More Information  

Saturday, January 11, 2020

Agua Chinon and the Sinks Exploration

Special Events

Please note: Preregistration is required due to limited parking capacity. Start your weekend off by exploring the Agua Chinon wash and the Sinks through this self-guided opportunity. Designated trails will be open for self-guided trail use in OC Parks’ Irvine Ranch Open Space. Trail routes vary in distance and level of difficulty with choices ranging […]

Agua Chinon and the Sinks Exploration
Date:
Sat, 01/11/2020
Time:
8:00 AM - 1:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
Variable
Distance:
Variable
Minimum Age:
12
Family Friendly:
Yes
Spaces Left:
Full
More Information  

Sunday, January 12, 2020

Moderate-Paced Ride: Limestone Canyon via Hicks Haul Road

Mountain Biking

This is a moderate-paced ride designed for the intermediate rider who has experience and skills, but sometimes needs to move slower in more technical areas with steep descents/ascents. This program is for very physically fit riders in excellent cardio condition. The ride starts at the Augustine staging area and travels along the Hick’s Haul paved […]

Moderate-Paced Ride: Limestone Canyon via Hicks Haul Road
Date:
Sun, 01/12/2020
Time:
8:00 AM - 10:30 AM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
11.5 miles
Minimum Age:
16
Spaces Left:
12 of 15
More Information  

Saturday, January 18, 2020

Limestone Canyon Photography Truck Tour

Interpretive

Join us on a backcountry wilderness driving tour filled with great sightseeing and photographic opportunities. Our journey begins at the Hicks Haul Staging Area, where you will board the back of an open-air, ten-seat, 4-wheel drive vehicle for a tour of Limestone Canyon. We will stop occasionally for 10-15 minutes or so to admire the […]

Limestone Canyon Photography Truck Tour
Date:
Sat, 01/18/2020
Time:
8:00 AM - 2:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
2
Distance:
16 miles
Minimum Age:
18
Spaces Left:
Full
More Information  

Sunday, January 19, 2020

Afternoon Adult Beginner Mountain Bike Ride: Limestone Canyon to The Sinks

Mountain Biking

A slow-paced beginner mountain bike ride for adults in Limestone Canyon through sycamores, oaks, and habitat native to California. The route takes us to The Sinks, Orange County’s own mini “Grand Canyon.” Along the way, we will stop and talk about the local habitat, and hope to see some of our local native animals and […]

Afternoon Adult Beginner Mountain Bike Ride: Limestone Canyon to The Sinks
Date:
Sun, 01/19/2020
Time:
2:00 PM - 4:30 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
Variable
Distance:
8 miles
Minimum Age:
18
Spaces Left:
Full
More Information  

Thursday, January 23, 2020

Thursday Morning Trek: Agua Chinon and The Sinks

Hiking & Fitness

Come out and join us on a breathtaking hike from the Irvine Open Space Preserve into OC Parks’ Limestone Canyon. This week’s docent-led hike begins in the Agua Chinon wash, continues to The Sinks, and may include a side trip to Box Springs, a natural year-round source of fresh water. Maximum distance is just short […]

Thursday Morning Trek: Agua Chinon and The Sinks
Date:
Thu, 01/23/2020
Time:
8:00 AM - 11:30 AM
Where:
Irvine Open Space Preserve
Difficulty Rating:
4
Distance:
7 miles
Minimum Age:
16
Spaces Left:
Full
More Information  

Monday, January 27, 2020

Hike to the Sinks: Limestone Canyon

Hiking & Fitness

Come along with us on this fast-paced morning hike through beautiful Limestone Canyon Nature Preserve to The Sinks. You’ll be rewarded with a spectacular view of The Sinks as well as sweeping views of Orange County and the Santa Ana Mountains. This hike involves steep climbs and descents on both double and single-track trails. Reviewing […]

Hike to the Sinks:  Limestone Canyon
Date:
Mon, 01/27/2020
Time:
7:30 AM - 11:30 AM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
10 miles
Minimum Age:
18
Spaces Left:
Full
More Information  

Tuesday, January 28, 2020

Stewardship Day at the West Sinks View Deck

Stewardship

Please join us as we enhance habitat adjacent to the west viewing deck at the Sinks in Limestone Canyon. This area is characterized by beautiful geological formations that resemble a mini Grand Canyon. Volunteers will travel for approximately 20 minutes in an open air safari style truck to the project site. The morning will be […]

Stewardship Day at the West Sinks View Deck
Date:
Tue, 01/28/2020
Time:
10:00 AM - 1:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
3
Distance:
1 miles
Minimum Age:
14
Spaces Left:
Full
More Information  

Saturday, February 1, 2020

Wilderness Access Day: Limestone Canyon

Special Events
Limestone canyon trail users

Start your weekend off by exploring numerous opportunities found throughout magnificent Limestone Canyon. Designated trails will be open for self-guided trail use in OC Parks’ Irvine Ranch Open Space. Trail routes vary in distance and level of difficulty with choices ranging from easy one-hour walks to strenuous 15-mile cardio treks. Whether traveling by feet, hooves […]

Wilderness Access Day: Limestone Canyon
Date:
Sat, 02/01/2020
Time:
8:00 AM - 2:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
Variable
Distance:
Variable
Minimum Age:
12
Family Friendly:
Yes
Spaces Left:
Full
More Information  
1 2 3