Get ready for an exhilarating outdoor experience at the Horsethief Canyon Trail Half Marathon and 10K, taking place on Saturday, November 1st, 2025, in the stunning Alpine, San Diego! Organized by the dedicated Rufus Schneider, this event promises an unforgettable day of running amidst breathtaking scenery.

Participants can look forward to a beautiful out-and-back course set in the dirt, offering a fantastic opportunity for a negative split day for half marathon runners, with mostly uphill terrain on the way out and a thrilling downhill return. The 10K route features a unique down-up-down-up challenge, making it perfect for those seeking an invigorating run. With friendly volunteers at strategically placed aid stations and enticing tech race shirts and awards on offer, this event is sure to be a highlight of the running calendar. Don’t miss your chance to be part of this amazing experience!