← Halloween weekend · Sports
Jackass Night Trail (31K)
McDowell Mountain Regional Park · Fountain Hills
McDowell Mountain Regional Park, 16300 McDowell Mountain Park Dr, Fort McDowell, AZ 85264
Night trail race of about 31 km (19 miles) on a single loop of the Javelina course, held on the Jalloween weekend of the Javelina Jundred. Costumes are part of the theme.
Heads up
- Start time not confirmed by the organizer; 5:30 p.m. (aggregator) vs. a 5:50 p.m. briefing listed on Runguides.
When
- Sat, Oct 3131K start 5:30 p.m.; race director briefing 5:50 p.m.
Start time from a single aggregator (haid.app); briefing time from Runguides
Forecast: 78° · 94% rain · Mostly Cloudy then Rain Showers Likely
Dates are stated explicitly by the source.
Getting in
Price not listed
Registration via UltraSignup / Aravaipa Running.
- Entry fee not found; registration likely required.
Where
Pin is approximate (matched to the venue, not a street address).
Sources
- runguides.com aggregator
Date Sat Oct 31, 2026 and 5:50 p.m. director briefing - haid.app aggregator
Jackass 31K start 5:30 p.m. (single-source)