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Coldwater Hundred
Jan 16, 2027 to Jan 17, 2027

Volunteer at Coldwater Hundred

Races run on volunteers. Select the shifts you want, up to 5, then sign up for all of them at once from the bar at the bottom of the screen. Shifts that clash with one you picked show why they are not available. You'll get a confirmation email for each shift with the details and a link to cancel if your plans change. Times are local to the race.

Times MST

Friday, Jan 157 of 9 open

Setup4 of 5 open

  • Setup (Friday)
    9:00 AM to 3:00 PM6 hr
    Coldwater HQ (Start / Finish), Estrella Mountain Regional Park, 14805 W. Vineyard Avenue, Goodyear, and the remote aid stations

Registration3 of 4 open

  • Registration (Friday)
    1:30 PM to 6:00 PM4.5 hr
    Coldwater HQ (Start / Finish), Estrella Mountain Regional Park, 14805 W. Vineyard Avenue, Goodyear

Saturday, Jan 1639 of 58 open

Registration1 of 6 open

  • Registration (Race Morning)
    5:45 AM to 8:45 AM3 hr
    Coldwater HQ (Start / Finish), Estrella Mountain Regional Park, 14805 W. Vineyard Avenue, Goodyear

Aid Stations31 of 44 open

Coldwater HQ
Start / Finish
4 of 9 open
  • Shift 1
    8:00 AM to 4:00 PM8 hr
  • Swing Shift
    9:00 AM to 1:00 PM4 hr
  • Shift 2
    Sat 4:00 PM to midnight8 hr
Gila
on course
4 of 4 open
  • Shift
    6:30 AM to 11:30 AM5 hr
Horse Thief
on course
11 of 12 open
  • Shift 1
    9:30 AM to 3:00 PM5.5 hr
  • Shift 2
    3:00 PM to 11:00 PM8 hr
  • Shift 3
    Sat 11:00 PM to Sun 7:00 AM8 hr
Pedersen
on course
8 of 11 open
  • Shift 1
    7:00 AM to 3:00 PM8 hr
  • Shift 2
    2:00 PM to 10:00 PM8 hr
  • Shift 3
    Sat 9:00 PM to Sun 6:00 AM9 hr
Rainbow Valley
on course
4 of 8 open
  • Shift 1
    7:00 AM to 3:00 PM8 hr
  • Shift 2
    2:00 PM to 10:00 PM8 hr
  • Shift 3
    Sat 9:00 PM to Sun 6:00 AM9 hr

Start and Finish3 of 4 open

  • Finish Line, Shift 1
    9:00 AM to 5:00 PM8 hr
    Finish line, Coldwater HQ (Start / Finish), Estrella Mountain Regional Park, 14805 W. Vineyard Avenue, Goodyear
  • Finish Line, Shift 2
    Sat 5:00 PM to Sun 1:00 AM8 hr
    Finish line, Coldwater HQ (Start / Finish), Estrella Mountain Regional Park, 14805 W. Vineyard Avenue, Goodyear

Course4 of 4 open

  • Course Sweep 1 (8.2 mi)
    2:00 PM to 6:00 PM4 hr
    Course, starting at Coldwater HQ
  • Course Sweep 2 (9.5 mi)
    2:00 PM to 6:00 PM4 hr
    Course, starting at Coldwater HQ

Sunday, Jan 1719 of 23 open

Aid Stations10 of 10 open

Coldwater HQ
Start / Finish
3 of 3 open
  • Shift 3
    Overnight, Sat into Sun, 12:00 AM to 8:00 AM8 hr
  • Shift 4 (Includes Breakdown)
    8:00 AM to 4:00 PM8 hr
Horse Thief
on course
2 of 2 open
  • Shift 4 (Includes Breakdown)
    7:00 AM to 1:00 PM6 hr
Pedersen
on course
3 of 3 open
  • Shift 4
    5:00 AM to 11:00 AM6 hr
Rainbow Valley
on course
2 of 2 open
  • Shift 4
    5:00 AM to 11:00 AM6 hr

Start and Finish3 of 3 open

  • Finish Line, Shift 3
    1:00 AM to 7:00 AM6 hr
    Finish line, Coldwater HQ (Start / Finish), Estrella Mountain Regional Park, 14805 W. Vineyard Avenue, Goodyear
  • Finish Line, Shift 4
    7:00 AM to 3:00 PM8 hr
    Finish line, Coldwater HQ (Start / Finish), Estrella Mountain Regional Park, 14805 W. Vineyard Avenue, Goodyear

Course2 of 6 open

  • Course Sweep 3 (11.9 mi)
    10:00 AM to 2:00 PM4 hr
    Course, starting at Coldwater HQ
  • Course Sweep 4 (12.1 mi)
    10:00 AM to 3:00 PM5 hr
    Course, starting at Coldwater HQ
  • Course Sweep 5 (7.0 mi)
    1:00 PM to 4:00 PM3 hr
    Course, starting at Coldwater HQ

Breakdown4 of 4 open

  • Breakdown (Sunday)
    2:00 PM to 8:00 PM6 hr
    Coldwater HQ (Start / Finish), Estrella Mountain Regional Park, 14805 W. Vineyard Avenue, Goodyear