Haunted Hills - San Carlos

Event details The Mt. Umunhum Trail Conquest - Fall takes place at Almaden Quicksilver County Park, Hacienda Entrance, 21785 Almaden Rd, San Jose, CA 95120. The event offers multiple trail distances: 50K Trail Marathon 30K Half Marathon 7..

Join the Ruth Anderson Memorial Endurance Run in San Francisco on October 11, 2025 for challenging looped ultramarathon distances. Choose from 100 km, 50 miles or 50 km on scenic Lake Merced loops with aid each circuit and chip timing.

Run scenic trails from Castle Rock Park into Mount Diablo State Park in Walnut Creek on October 18, 2025 with 5K, 10K, half marathon and summit 30K options. Expect dirt paths, creek crossings and panoramic summit views for all paces.

The Running Dead 5K Fun Run in Union City, California, is a Halloween-themed community race at Civic Center/City Hall (34009 Alvarado-Niles Road). It offers a 5K open to adults and a 5K Youth option for younger runners. The course follows t..

Join the Quicksilver Trail Challenge at Almaden Quicksilver County Park in San Jose on Oct 25, 2025. Pick a scenic half marathon, 10K, or free kids one mile and explore single track trails with sweeping Mt Umunhum views.

Event overview The Haunted Hills 5K & 10K is a Halloween-themed walking and running event in Redwood City, CA, on October 25, 2025. It is organized as a trick-or-treat style course for adults and families. Participants form teams of 1 t..