Activity Cards

Join us for an unforgettable guided mountain bike adventure through some of Orange County’s most scenic and protected landscapes. This docent-led ride kicks off at the historic Bommer Canyon Cattle Camp, where we’ll climb the West Fork Trail to the top of Bommer Ridge. Take in sweeping panoramic views as you catch your breath—this is just the beginning.

From there, we’ll flow over to Lizard Trail, riding through lush riparian habitat before a short climb brings us to Serrano Ridge. Enjoy a fun descent down Camarillo Trail as we make our way to the Nix Nature Center for a quick water refill and reset.The adventure continues with a mix of rolling climbs and rewarding terrain as we make our way to the Cattle Crest trailhead.

From there, we’ll ride Cattle Crest into Shady Oaks—both offering a fun blend of challenging downhill singletrack and short, punchy climbs to keep things exciting.
After one final push out of the canyon, we’ll reach the gate to Hogback—your gateway to one of the most fun, flowy singletrack descents in Orange County. We’ll finish with the exhilarating Ridge Route, a fast, flowing ride back down to our starting point.

Expect great trails, stunning views, and a supportive group atmosphere. Whether you’re looking to challenge yourself or simply enjoy the ride, this is an experience you won’t want to miss. This intermediate-paced ride is designed for experienced riders who are in excellent physical condition and comfortable on challenging singletrack terrain. Expect a rewarding 15-mile route with approximately 3,000 feet of elevation gain, featuring a mix of sustained climbs, exhilarating descents, and a few technical sections where riders may choose to walk their bikes.

If you have at least a year of mountain biking experience and are ready for a fun, challenging ride in a truly beautiful setting, we invite you to join us. Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-5 activity on the land

This activity originates in the City of Irvine’s Open Space Preserve and travels into OC Parks’ Laguna Coast Wilderness Park. You can view the approximate route and find more details here. Please note that some trails are only accessible on designated Wilderness Access Days or on scheduled activities such as this. Also, routes are subject to change.

Join us in the back-country wilderness for a journey filled with beautiful sights that are photographic and artistic sketching opportunities. Our journey begins in the afternoon. We will be deep in a secluded canyon, where time is measured in centuries, even millennia, in the sandstone cliffs of this ancient place called Limestone Canyon. You will board a 4-wheel drive vehicle for a 13-mile tour of the canyon and hills surrounding it. We will stop frequently for 15-30 minutes to admire the views, take photos, sketch landscapes, and answer questions.

IRC staff, local butterfly enthusiasts, and experts continue to monitor IRC’s butterflies every month! We will be recording number and types of butterflies encountered along the trails of Limestone Canyon. Our butterfly count will provide a benchmark estimate of diversity and number of these beautiful insects to compare to future local surveys and to larger patterns being compiled nationwide. Be prepared to share your appreciation and knowledge of butterflies. Bring close-focus binoculars and be ready to be out on the trail for the full morning.  Spaces are limited.