Join us for a challenging and strenuous hiking adventure that encompasses Fremont Canyon and Weir Canyon. Fremont Canyon is the most rugged and remote area of the Irvine Ranch Natural Landmark and contains a wide range of native plants and wildlife. Weir Canyon has an intimate feeling of remoteness and seclusion with its rugged canyon walls and thick Coastal Live Oak canopy.

This is a 14-mile hike with a 1900-foot elevation gain. We will travel at an average moving pace of 3 miles per hour. This hike is designed for advanced hikers that are physically fit and experienced in distance hiking. Our hike will start in Irvine Regional Park and cross over to Fremont Canyon. We will enter Fremont Canyon and hike to Upper Blind Canyon with a brief stop under the toll road. From here we will continue to the Overlook trail and then descend into Weir Canyon.

Please arrive 15 minutes early. Come prepared with a backpack with at least 3 liters of water (100 oz), trail snacks, closed-toed hiking shoes, sunscreen, and any other supplies you need to keep you safe on the trails. Each participant MUST carry his or her own pack and water. Under-prepared participants will be denied access to this program.

Please note, advanced registration required, no walk-up registration is permitted.

Reviewing the 1-through-5 Difficulty Ratings will help you evaluate your readiness to participate in this level-5 activity on the land. Please visit our FAQ page for answers to activity specific questions you may have prior to registering. To learn more about the staging areas and activity locations, please visit our Staging Areas Playlist page.

Learn more and register here