Coldwater Rumble

Event Details

Date: Saturday, January 17, 2026

Location: Estrella Mountain Competitive Track, Estrella Mountain Regional Park, Goodyear, AZ

Distances:

• 100 Miler
• 100K
• 60K
• 40K
• 10 Miler
• 5 Miler

All finishers will receive a finisher award, and buckles will be awarded to 100 mile finishers.

Weather is typically mild, with highs in the mid 60’s and lows in the low 40’s.

Registration Information

Registration closes on Monday, January 12 at 11:59 PM MT.

Volunteer Opportunities

If you're interested in volunteering, join our team! Volunteer roles include event setup, aid stations, and photography, with perks like Aravaipa merchandise.

Cupless Events

In support of sustainability, the event promotes cupless racing. Participants can bring their own reusable cups or use UltrAspire cups available at registration.

Start Times

• 100 Miler: 7:00 AM

• 100K: 7:15 AM

• 60K: 7:30 AM

• 40K: 8:00 AM

• 10 Miler: 8:30 AM

• 5 Miler: 8:45 AM