Green Valley Lake Half Marathon

Event overview

The Green Valley Lake 5K / 10K / Half Marathon is scheduled for Saturday, August 1, 2026, in Green Valley Lake, California (33274 Green Valley Rd, 92341). The event offers three race distances:

• 5K
• 10K
• Half Marathon

Race headquarters and packet pickup are at the Black Dog Social Club (33231 Green Valley Lake Rd). Post-race activities and the awards ceremony are held in the Downtown Community Garden on Main Street. The event benefits The Children’s Forest via the Southern California Mountains Foundation.

Course and logistics

All races start with a 3/4-mile out-and-back loop around the lake. The route then climbs Green Valley Lake Road onto Forest Service Road 2N13, with a roughly 400 ft climb to a viewpoint near the 5K turnaround. The surface is partly paved (about 1.5 miles) and then transitions to dirt roads and trail. The 10K extends about 1.55 miles beyond the viewpoint before returning. The half marathon follows an out-and-back route that reaches a high point with an additional short scramble trail to a viewpoint; the half marathon includes multiple aid stations on course. Water and aid stations are placed approximately every 1.5 miles. Chip timing will be provided by Itz About Time. Prizes include top-three overall awards per distance and age-group medals 3 deep in five-year spans up to 80+. Prices are listed per distance on the event page. Visit the organization's website for the most recent information.