Activities and Programs


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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, May 22, 2022

Limestone Canyon Geology Hike to The Sinks

Interpretive
Limestone Canyon Geology Hike to The Sinks

Come along with us to visit one of the most photographed and famous sites on the Irvine Ranch Natural Landmarks – The Sinks. This interpretative program will begin with a hike along a canyon corridor and will visit The Sinks. Along the way, we’ll talk about the geologic processes that over millions of years created the geologic features of The Sinks and the surrounding area.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-4 activity on the land.

Limestone Canyon Geology Hike to The Sinks
Date:
Sun, 05/22/2022
Time:
7:30 AM - 1:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
9 miles
Minimum Age:
18
Spaces Left:
Full
More Information  

CANCELLED: Afternoon Family Beginner Mountain Bike Ride: Limestone Canyon to The Sinks

Mountain Biking
CANCELLED: Afternoon Family Beginner Mountain Bike Ride: Limestone Canyon to The Sinks

For families and children ages 12 and up who would like to join IRC-certified volunteers on a longer slow-paced, family-oriented ride through sycamores, oaks, and habitat native to California. The route takes us to The Sinks, Orange County’s own “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 raptors. The ride is an 8-9 miles with 400-800 feet of elevation gain that may require hike-a‐bike for some riders.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level 2-3 activity on the land. Motorized recreation vehicles of any class or type are not permitted for recreational use.

CANCELLED: Afternoon Family Beginner Mountain Bike Ride: Limestone Canyon to The Sinks
Date:
Sun, 05/22/2022
Time:
4:30 PM - 7:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
3
Distance:
8 miles
Minimum Age:
12
Spaces Left:
15 of 15
More Information  

Monday, May 23, 2022

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

Equestrian
The Lure and Lull of Limestone Canyon Equestrian Ride to The Sinks or Dripping Springs
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 you evaluate your readiness to participate in this level-3 activity on the land.

The Lure and Lull of Limestone Canyon Equestrian Ride to The Sinks or Dripping Springs
Date:
Mon, 05/23/2022
Time:
10:00 AM - 2:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
3
Distance:
8 miles
Minimum Age:
16
Spaces Left:
Full
More Information  

Wednesday, May 25, 2022

After Work Fitness Hike: Limestone Ridge

Hiking & Fitness
After Work Fitness Hike: Limestone Ridge

Come along with us on this afternoon fitness hike through beautiful Limestone Canyon Nature Preserve. 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 is a 10 mile fitness hike, completed in 3 hours and includes a 1000+ foot elevation change. The hike is for experienced, physically fit hikers who enjoy the challenge of multiple steep climbs and descents.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-4 activity on the land.

After Work Fitness Hike: Limestone Ridge
Date:
Wed, 05/25/2022
Time:
5:30 PM - 8:30 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
10 miles
Minimum Age:
18
Spaces Left:
11 of 20
More Information  

Friday, May 27, 2022

Distance Hike: Limestone Canyon

Hiking & Fitness
Distance Hike: Limestone Canyon

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 10–13 mile hike offers sweeping views of Orange County and the Santa Ana Mountains as well as possible wildlife sightings. This hike may include a visit to The Sinks and/or Dripping Springs.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-4 activity on the land.

Distance Hike: Limestone Canyon
Date:
Fri, 05/27/2022
Time:
6:30 AM - 12:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
13 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 05/19/2022
More Information  

Saturday, June 4, 2022

Wilderness Access Day: Limestone Canyon

Special Events
Wilderness Access Day: Limestone Canyon

PRE-REGISTRATION is REQUIRED for this event. 

All participants are required to have, a printed copy or on their phone, the confirmation email to show through the window of their vehicle to drive through the entry gate.

You will need the confirmation email for you and your guests to enter the trail system.

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, or wheels, Wilderness Access Day in Limestone Canyon is a treasure waiting to be discovered by hikers, equestrians, and mountain bikers alike.

Participants will want to plan their day successfully by using Trail Tips to prepare.

Wilderness Access Day: Limestone Canyon
Date:
Sat, 06/04/2022
Time:
8:00 AM - 2:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
Variable
Distance:
Variable
Minimum Age:
All Ages
Family Friendly:
Yes
Spaces Left:
Full
More Information  

Wilderness Access Day: Limestone Canyon, Equestrian

Equestrian
Wilderness Access Day: Limestone Canyon, Equestrian

PRE-REGISTRATION is REQUIRED for this event. 

All participants are required to have, a printed copy or on their phone, the confirmation email to show through the window of their vehicle to drive through the entry gate.

You will need the confirmation email for you and your guests to enter the trail system.

Come experience Limestone Canyon’s beauty from the back of your horse. Designated trails will be open for self-guided access hiking, biking, and equestrian use during Wilderness Access Day in Limestone Canyon. Equestrian riders who have trail riding experience with a fit and able horse will enjoy the historic ranch roads of days gone by. Take in the awe-inspiring vistas from the mighty ridge tops and drink in the cool canyon shade through the oak grove.

There is limited space for equestrian parking. Riders must also have the ability to transport their horse to the staging area.

Wilderness Access Day: Limestone Canyon, Equestrian
Date:
Sat, 06/04/2022
Time:
8:00 AM - 2:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
Variable
Distance:
Variable
Minimum Age:
12
Spaces Left:
Full
More Information  

Sunday, June 5, 2022

Intermediate Mountain Bike Ride from Irvine to Limestone Canyon

Mountain Biking
Intermediate Mountain Bike Ride from Irvine to Limestone Canyon

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 wildlands, and even Catalina Island on clear days. From Loma Ridge, we descend on a single track to the Box Spring which provides year-round water for wildlife like deer.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-4 activity on the land. Motorized recreation vehicles of any class or type are not permitted for recreational use.

Intermediate Mountain Bike Ride from Irvine to Limestone Canyon
Date:
Sun, 06/05/2022
Time:
7:30 AM - 11:00 AM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
16 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 05/28/2022
More Information  

Sunday, June 12, 2022

Limestone Canyon Geology Hike to The Sinks

Interpretive
Limestone Canyon Geology Hike to The Sinks

Come along with us to visit one of the most photographed and famous sites on the Irvine Ranch Natural Landmarks – The Sinks. This interpretative program will begin with a hike along a canyon corridor and will visit The Sinks. Along the way, we’ll talk about the geologic processes that over millions of years created the geologic features of The Sinks and the surrounding area.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-4 activity on the land.

Limestone Canyon Geology Hike to The Sinks
Date:
Sun, 06/12/2022
Time:
7:30 AM - 1:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
9 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 06/04/2022
More Information  

Monday, June 13, 2022

Monday Morning Super Trek: Limestone Canyon to Box Springs and the Sinks

Hiking & Fitness
Monday Morning Super Trek: Limestone Canyon to Box Springs and the Sinks

Come start your week with us on our SuperTreks in the Landmarks. Join us as we explore Limestone Canyon. We will hike across East Loma and enjoy beautiful views of the surrounding hills, out to the coast, and of Irvine Lake. We will continue to Box Springs and the west side of the Sinks before making our return through Limestone Canyon. Please wear hiking shoes/boots and bring water, a trail snack, sunscreen, hat, and any other necessary equipment to keep you safe on the trail.
Participants must be able to hike 10 miles with an elevation gain of 1700 feet at an average moving rate of 3 miles per hour.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-4 activity on the land.

Monday Morning Super Trek: Limestone Canyon to Box Springs and the Sinks
Date:
Mon, 06/13/2022
Time:
7:30 AM - 12:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
10 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 06/05/2022
More Information  

Sunday, June 19, 2022

Slow-paced Mountain Bike Ride – Limestone Canyon

Mountain Biking
Slow-paced Mountain Bike Ride - Limestone Canyon

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.

This is a slow-paced ride designed for the beginner that has experience riding fire roads such as Limestone Canyon or Telegraph Canyon, but wants to develop their climbing and riding abilities. The ride can also be enjoyed by more advanced riders looking for a relaxed ride in a beautiful setting.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-3 activity on the land. Motorized recreation vehicles of any class or type are not permitted for recreational use.

Slow-paced Mountain Bike Ride - Limestone Canyon
Date:
Sun, 06/19/2022
Time:
8:30 AM - 11:00 AM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
3
Distance:
13 miles
Minimum Age:
14
Spaces Left:
Registration for this event opens at 8:00am on 06/11/2022
More Information  

Monday, June 20, 2022

Distance Hike: Limestone Canyon

Hiking & Fitness
Distance Hike: Limestone Canyon

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 10–13 mile hike offers sweeping views of Orange County and the Santa Ana Mountains as well as possible wildlife sightings. This hike may include a visit to The Sinks and/or Dripping Springs.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-4 activity on the land.

Distance Hike: Limestone Canyon
Date:
Mon, 06/20/2022
Time:
6:30 AM - 12:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
4
Distance:
13 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 06/12/2022
More Information  

Thursday, June 23, 2022

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

Equestrian
The Lure and Lull of Limestone Canyon Equestrian Ride to The Sinks or Dripping Springs
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 you evaluate your readiness to participate in this level-3 activity on the land.

The Lure and Lull of Limestone Canyon Equestrian Ride to The Sinks or Dripping Springs
Date:
Thu, 06/23/2022
Time:
10:00 AM - 2:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
3
Distance:
8 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 06/15/2022
More Information  

Sunday, June 26, 2022

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

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

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 raptors. For mountain bikers with a minimum of six months of trail experience who would like to join IRC-certified volunteers on an 8 – 9 mile ride with 400 – 800 feet of elevation gain.  This ride is for adult riders only. Allow up to 2.5 hours of riding time.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level 2- 3 activity on the land. Motorized recreation vehicles of any class or type are not permitted for recreational use.

Afternoon Adult Beginner Mountain Bike Ride: Limestone Canyon to The Sinks
Date:
Sun, 06/26/2022
Time:
4:00 PM - 6:30 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
3
Distance:
8 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 06/18/2022
More Information  

Tuesday, June 28, 2022

The Lure and Lull of Limestone Canyon and The Sinks: Equestrian Ride

Equestrian
The Lure and Lull of Limestone Canyon and The Sinks: Equestrian Ride
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 you evaluate your readiness to participate in this level-3 activity on the land.
The Lure and Lull of Limestone Canyon and The Sinks: Equestrian Ride
Date:
Tue, 06/28/2022
Time:
10:00 AM - 2:00 PM
Where:
Limestone Canyon Nature Preserve
Difficulty Rating:
3
Distance:
8 miles
Minimum Age:
18
Spaces Left:
Registration for this event opens at 8:00am on 06/20/2022
More Information