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.
Updated Difficulty Ratings: The Hiking and Fitness Difficulty Ratings have been updated to reflect our current activities. Please click below to read the ratings.
Click here to learn more about IRC-Certified Volunteers. • Click here to learn more about the Difficulty Ratings.
Search & Filter Activities
Wednesday, May 7, 2025
After Work Fitness Hike on Paved Hicks Haul Road

Join us every Wednesday night in OC Parks’ Irvine Ranch Open Space for a fitness-focused hike on the paved Hicks Haul Road. During the spring, summer and fall, hikers will enjoy wonderful sunset views and a panoramic overview of Orange County. This hike travels about 3.5 miles, up to the top of Loma Ridge and back down. The hike is conducted at an average of 3-3.5 miles per hour, but you may travel a bit faster or slower, at a walk, run, or jog depending on your comfort level. Most participants finish the route in about 1 hour. Because of the paved surface of the road, you may wear regular running or walking shoes. Trail shoes are fine, but not required. Please bring adequate water.
Sunset Hike in Orchard Hills

Come out and enjoy the sunset with us on the Orchard Hills loop trail. This trail meanders around an avocado orchard on the edge of the open space preserve and provides fantastic ridge-top views of Irvine and the Pacific coastline.
The three-mile loop has several very steep climbs and uneven terrain. This hike is done at a moderate pace. Your effort is rewarded with a beautiful, unobstructed view to the west. This hike is not suitable for children under 12. Wear sturdy, closed-toed hiking shoes, bring water and a red LED flashlight.
Thursday, May 8, 2025
Thursday Morning Trek: Quail Hill

This week in the Irvine Open Space Preserve, we’ll be in Quail Hill, once part of the historic Irvine cattle ranch. The hike is seven and a half miles with some climbing but rewards you with fantastic views overlooking Laguna Canyon and many Irvine locales. Please bring water, a trail snack, sunscreen, hat and any other necessary equipment to keep you safe on the trail. Get your boots out and register to hike the Quail Trail and Shady Canyon singletrack trails.
Biking the Bay

Join OC Parks for an interpretive bike ride around Upper Newport Bay! Participants will have the opportunity to get their heart rate up and pedal around the Bay, all while learning about local ecology and history.
This moderately-paced ride will cover a 10 mile section of the Back Bay Loop trail over the course of 2 and a half hours. We will remain on the paved portion of the trail and will have interpretative stops along the way.
Participants must provide their own bike and helmet. E-bikes are welcome. Please note that the pace and talking points are geared towards individuals aged 14 and up. Minors must have a parent/guardian present at all times.
Distance: 10 miles
Elevation Change: 155 feet
Advance registration required. The parking and program are free. Rain or adverse weather will cancel the event.
Fitness Hike – Ridge Park

Please be aware this is a Fitness Hike and not for beginners; the pace is approximately a 19-minute mile. Join Laguna Canyon Foundation Volunteers to raise your heart rate and your spirits on this strenuous, moderately paced, 6.6-mile hike over steep and uneven terrain with a 1,100-ft. elevation gain.
Age: 16 or older. Participants under 18 must be accompanied by a parent or guardian.
Location: Ridge Park, Laguna Coast Wilderness Park. Meet at the end of Ridge Park Road/Trail Entrance.
Parking: Free neighborhood parking. Please park legally. Parking is limited, carpooling is encouraged.
Difficulty Rating: 4/5
Materials: Participants must bring plenty of water, closed-toed hiking shoes, and sun protection. Hiking poles are recommended.
Safety precautions and protocols:
Advanced registration required. Every individual, including children, must be registered. Register here.
Group sizes are minimized for safety purposes. For group registrations or questions please email volunteer@lagunacanyon.org
Participants must individually sign a waiver at the beginning of the program. For participants under 18, a parent or guardian must sign the waiver.
To protect all employees, volunteers, and participants, please do not attend if you are not feeling well, have symptoms of illness or have been in contact with someone who was ill.
Contact volunteer@lagunacanyon.org with any questions.
Weather, including high temperatures and wet or muddy trail conditions, may lead to cancellation of this event.
Butterfly Series: Limestone Canyon Butterfly Habitat Islands

Spend your morning helping to remove weeds and rebuild berms within the butterfly habitat islands in Limestone. With your help we will be able to maintain “islands” of host and nectar plants for butterflies in decline in Limestone Canyon. You will be transported from via a safari style truck from butterfly island to butterfly island through a beautiful oak woodland.
What’s Buzzing at the Native Seed Farm? Native Plants and their Pollinators!

Join us as we explore the native seed farm while learning about plants, pollination, and pollinators. We’ll focus on the native plants grown at the farm as we talk about, and identify, the pollinators we find on them. Closed-toe shoes and water are required for the walk. Hats and sunscreen highly recommended.
Agua Chinon Equestrian Ride

Join us on an equestrian ride up Agua Chinon Canyon in OC Parks’ Irvine Ranch Open Space. We will make our way to see the wonders of the Sinks, Orange County’s mini Grand Canyon. Equestrians must have their own horse, trail riding experience, and the ability to transport their horse to the staging area.
This ride includes moderate to steep climbs. Terrain will vary.
Evening Hike on Hicks Haul Road

Enjoy an evening hike through stunning rock formations and fragrant native plants as you listen to the sounds of nature. During this hike in the Irvine Open Space Preserve, you may travel at various hiking speeds based on your comfort level. This out-and-back program travels 3.5 miles round trip up to scenic Loma Ridge and back down. Please bring a red-tinted flashlight as the return portion of the hike may be after sunset.
Friday, May 9, 2025
Early Morning Hike to The Sinks: Limestone Canyon

Come along with us on this morning hike through beautiful Limestone Canyon Nature Preserve, part of OC Parks’ Irvine Ranch Open Space. 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.
Growing Together at the Native Seed Farm

Looking for a way to give back to Nature this Spring? Come help us behind the scenes at the Irvine Ranch Conservancy’s one-of-a-kind Native Seed Farm in Irvine! Every day at the farm is different; depending on the needs of the farm we will be harvesting seeds from beautiful native plants, planting new seeds in the annual plots, working in our native plant demo garden, or tending to younger seedlings in our nursery.
Working with us at the Native Seed Farm is a great way to grow your community and cultivate knowledge about local plant and wildlife! Absolutely no experience or special equipment required!
Nature Hike at Gypsum Canyon Wilderness

Come join us at Gypsum Canyon Wilderness, part of OC Parks’ Irvine Ranch Open Space. The hike is 3-4.5 miles in length with elevation gain. We will hike along Oven Canyon trail through mixed habitat and then up through a single-track trail with switch backs and elevation gain to a 3 different overlook points with a spectacular view of Orange County. Please bring water, sunscreen, hat, and any other necessary equipment to keep you safe on the trail and wear sturdy, closed-toe hiking shoes. Participants must be able to hike up to 4.5 miles with an elevation gain of 500 feet at an average moving rate of 3 miles per hour. Each hiker must carry their own water and supplies.
Wild Tales

Spending time outside is one of the best ways to nurture curiosity and instill a love of the natural world. Bring your young ones and join OC Parks staff to learn all about the Newport Back Bay.
Our Wild Tales program is offered every Friday from 10:00-11:00am and includes a story time, an age-appropriate hike, and a themed craft. Each week will focus on a different topic that encourages young ones to learn about the outdoors.
The program begins at the Peter and Mary Muth Interpretive Center. Program content is tailored for the preschool level (ages 2-5), but all are welcome to attend. Minors under age 18 must be accompanied by an adult guardian. Please wear comfortable attire and closed-toe shoes.
Advance registration is recommended. Program and parking are free.
Adverse weather conditions may move the program indoors or cancel it.
Slowing Down in Nature: Mindfulness and Nature Journaling

Join OC Parks staff and volunteers to observe the sights, sounds and smells of nature in a new way. During this unique program we will combine nature journaling with an intimate nature walk led by a certified nature and forest therapy guide. Nature journaling is a wonderful tool to make observations and create lasting memories, and our mindfulness walk will invite you to explore your own connection with nature.
For the nature journaling portion of this program, please bring a nature journal and your own art materials such as pencils, pens, or watercolors. A portable chair is recommended along with sun protection, water and snacks. Be prepared to move along the trail a short distance and sit to document the beauty around you.
Please note that this is a slow-paced program that is geared for ages 14 and up. No experience necessary! We will begin outside of the Peter and Mary Muth Interpretive Center. The program and parking are free.
Advance registration required. Rain or adverse weather will cancel the program.
Hangman’s Tree Monument Hike: Orchard Hills

Join us for a challenging and beautiful adventure as we hike to the Hangman’s Tree Monument on Loma Ridge. Hike distance is 6 miles and affords fantastic views along the way, spanning the Pacific coastline, San Gabriel peaks and the Santa Ana Mountains. Several very steep climbs and descents are part of this route. We’ll accumulate almost 1800 feet of climbing elevation.
Saturday, May 10, 2025
Hangman’s Tree Monument Hike: Orchard Hills

Join us for a challenging and beautiful adventure as we hike to the Hangman’s Tree Monument on Loma Ridge. Hike distance is 6 miles and affords fantastic views along the way, spanning the Pacific coastline, San Gabriel peaks and the Santa Ana Mountains. Several very steep climbs and descents are part of this route. We’ll accumulate almost 1800 feet of climbing elevation.
Limestone Canyon – Weekend Hike to Both Sides of the Sinks

Join us on this moderate-paced hike over the ridge and the through beautiful Limestone Canyon Nature Preserve, part of OC Parks’ Irvine Ranch Open Space. We will enjoy short breaks at the East and West Sinks viewing platforms before hiking back through the canyon. We will enjoy a view of wonderful vistas in addition to spectacular view of The Sinks. This hike involves hiking on both double and single-track trails with an elevation gain of 1000.
Mountain Bike Ride at Fremont and Weir Canyons to Sierra Peak

Join us in OC Parks’ Irvine Ranch Open Space for a challenging docent-led mountain bike ride for very experienced off-road riders in excellent cardio shape through Fremont and Weir Canyons to Sierra Peak.
We will climb out of Irvine Regional Park on Coal Mine Road to the Fremont Canyon Weather Station and then continue on past the Tecate Cypress grove, Lizard Rock and Mini-Moab on the way to Sierra Peak . We will return to the staging area via much of the same route but will finish by riding through Upper Blind Canyon to Weir Canyon.
Restoration Day

Lend a helping hand to improve native habitat at Peters Canyon Regional Park. Dedicate the morning to caring for restoration sites and help our native plants and shrubs thrive. Be prepared for weeding, watering, or planting as needed.
Strong gardening gloves, trail snacks, water, sun protection and wearing clothes you don’t mind getting dirty are highly recommended.
Program and parking are free. Parking passes will be made available to volunteers at check-in. The program will begin in the parking lot and will proceed to the restoration site. Be prepared to hike a moderate distance with tools.
Advance registration required.
For questions, please contact resource specialist Shelly Marshall at (714) 973-6625 or shelly.marshall@ocparks.com.
Agua Chinon and the Sinks Exploration Day

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 from easy one-hour walks to a strenuous 9.5-mile trek. Whether traveling by feet or on two wheels, this exploration day is a treasure waiting to be discovered by hikers and mountain bikers alike. Visitors to the Open Space during this activity are able to hike or bike to the West and East Sinks viewing areas.
Please review our Trail Tips page and FAQ page to prepare for this challenging hiking and biking opportunity.