Join us in OC Parks’ Irvine Ranch Open Space for a challenging, docent-led mountain bike ride through Fremont Canyon to the unique geological formation known as Lizard Rock. This 16-mile out-and…

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…

IRC Volunteers are needed to support IRC managed Exploration Day, a special event that provides the public with a rare opportunity to explore designated wilderness areas through a self-guided…

Join us for a slow-paced hike through Limestone Canyon Nature Preserve. Slowing our pace will encourage us to experience the land with all of our senses. If you enjoy recording your sightings of…

Enjoy the relaxation of riding in the wilderness on empty trails. Join us on this docent-led mountain bike ride through Limestone Canyon, part of OCParks’ Irvine Ranch Open Space. We will visit the…

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…

Do you want to explore the Sinks, a geological rock formation that has got its reputation as “Orange County’s miniature Grand Canyon”? Come out and join us on a hike from the Portola staging area to…

Explore beautiful Limestone Canyon, part of OCParks’ Irvine Ranch Open Space, on this serene morning hike to Dripping Springs. Limestone Canyon Nature Preserve is one of the most pristine wilderness…

Enjoy an afternoon family hike in Red Rock Wilderness, part of OC Parks’ Irvine Ranch Open Space. We will hike along a flat trail and cross a dry creek as we watch for red-tailed hawks and mule deer…

Access is first come, first served until parking capacity is reached. No registration required.Explore 6 miles of trails at Gypsum Canyon Wilderness through this self-guided opportunity.Located…