Irvine Ranch Natural Landmarks

Highly experienced mountain bikers can explore Limestone Canyon, part of OCParks’ Irvine Ranch Open Space, from the trails on this fast-paced, advanced ride.  This ride will reward you with beautiful views, diverse native plants and animals.

PLEASE NOTE: there are multiple very steep climbs, with an approximate elevation gain of 2,200 feet over 10-14miles.  This hard ride is for expert adult-only riders in excellent physical condition. This ride includes natural trail hazards such as sand, tree roots, ruts, and exposed rocks. Unprepared riders may be turned away. Please have plenty of water, snacks, and all the items you will need to keep you safe and healthy on the trail. Conditions can change rapidly, and we suggest you have sun protection, a helmet, and gloves.

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.

Please note that you will be asked to adhere to the following measures in order to participate:

• Be registered in advance, no walk-up registration is permitted.
• Arrive with all necessary equipment to keep you safe on the trail, including water, proper attire, and closed-toe footwear, first aid, health needs etc.
• Restrooms will be available, but facilities will not be sanitized for each individual.
• All participants are required to sign a liability waiver upon arrival at the staging area and before beginning the activity. The waiver can be previewed here: IRC Liability Waiver
• You may be prevented from participating if you do not adhere to the above protocols.

Additionally, in an effort to respect and protect all employees, volunteers, and participants, please do not sign up or attend if you are not feeling well, exhibiting any symptoms of illness or have been in recent contact with someone who was ill.