Lake Chabot Trail Challenge

The 2025 Lake Chabot Trail Challenge features a Half Marathon and a 5K run, taking place in Castro Valley, California. This annual event, now in its 41st year, is popular among trail runners and offers scenic courses with views of Lake Chabot, Mt. Diablo, and the San Francisco Bay.

The Half Marathon is a hilly loop primarily on dirt fire roads, while the 5K is an out-and-back route with gentle rolling hills. Participants can enjoy amenities such as water stations and first aid support. Awards are given for finishers and top age division competitors. Visit the organization's website for the most recent information.