Hill to Hollow 100km

Hill to Hollow 100km

Register for the first-ever Hill to Hollow 100km, a challenging ultramarathon taking place on Saturday, September 20, 2025, at 7:00 AM ET. This race, co-directed with Pete Dady of the Hash House Harriers, will traverse four counties, starting and ending in Morgan Hill State Forest (camping available). The course follows the Onondaga Trail, offering stunning vistas and challenging terrain. The race is Trail Sisters approved and a UTMB Index race.

Race Details:

• Distance: ~63.8 miles (~100km)
• Elevation Change: ~10,286 feet
• Aid Stations: 6 (excluding Start/Finish)
• Pacers: Allowed after mile ~33
• Crew: Allowed at all aid stations
• Required Gear: Fully charged cell phone, offline navigation device, headlamp, reflective vest, emergency blanket, waterproof shell, water filtration device, minimum 800mL liquid storage, minimum 400 kcal food.
• Cutoff: 20 hours

100km Relay:

• Total Distance: ~63.8 miles
• Total Elevation Change: ~10,286 feet
• Exchanges/Aid Stations: 6 (excluding Start/Finish)
• Legs: 8
• Leg Distance: 7.1 to 8.8 miles
• Cutoff: 20 hours

Registration:

• 100km: $90.00 (plus taxes and fees)
• 100km Relay: $180.00 (plus taxes and fees)

Start/Finish Location: Spruce Pond on Herlihy Rd. (42°47'56.9"N 76°01'32.4"W)