coldwater rumble

Coldwater Rumble Trail Runs

January 20, 2018
100M | 52M | 52K | 20M | 20K | 4M
Estrella Mountain Regional Park, Goodyear, AZ

7:00 AM – 100 Mile
7:30 AM – 52 Mile
8:00 AM – 52 Km
8:30 AM – 20 Mile
8:45 AM – 20 Km
9:00 AM – 4 Mile

The Coldwater Rumble is the fifth race in the Aravaipa Running – Desert Runner Trail Series, Arizona’s premier trail & ultra run series.
Quail Series = 4 Mile | Roadrunner Series = 20 Km | Owl Series = 20 mile | Hawk Series = 52 Km, 52 Mile

Quick Links: Race Info | Registration | Course Info | Results | Photos | Race Day


This race is part of a Series Pass! Check out some options HERE! 


UTMB Points *

100 Miles 5 Points
52 Miles 4 Points
52K 2 Points

*These points will be applied for the 2019 UTMB



Ramada 8 in the “Turf Area”
Estrella Mountain Regional Park, Goodyear, AZ. Directions

Course Summary
Follow desert trails that wind through the foothills of the rugged and jagged Sierra Estrella mountain range. Many trails at Estrella Mountain Regional Park have recently been re-worked and there are several new miles of trail in use for this new course. The 100 mile race will feature five 20 mile loops.

Forecast for Goodyear, AZ
Average highs for this time of the year are in the mid 60’s and lows in the low 40’s. While a storm and/or a cold snap does happen, expect beautiful running weather in the Valley of the Sun!

Host Hotel
TownPlace Suites by Marriott Phoenix/Goodyear
13971 Celebrate Life Way
Goodyear  AZ  85338

Bib/Shirt Pickup
Thursday, January 18
Packet Pickup 5:00-7:00PM
Group run 5:30-6:30PM

iRun Phoenix
4730 E. Indian School Rd. #125
Phoenix, AZ 85018
(602) 368-5330


Friday, January 19  – 4:00 – 6:00PM
Estrella Mountain Regional Park


Saturday, January 20 – 6:00 – 8:45AM
Estrella Mountain Regional Park

Aid Stations
Aid stations every 3.4-7.9 miles (mile 2.2 in the 4 Mile) including water, electrolyte drink, sweet snacks, salty snacks, and fruit. Please plan to run with at least one bottle of water.

Race Perks
Gender specific race shirt (Men’s & Women’s styles)
Chip timed race results displayed at finish line
Scenic and challenging course on desert trails
Well stocked aid stations every 3.4-7.9 miles
Post race food & socializing
Finisher award pint glass
Buckles to 100 Mile Finishers under 32 hours
Sub 24 Hour buckle to 100 Mile Finishers under 24 hours

NEW: Cupless Events

In an effort to continually lessen our race footprint, we are expanding our cupless events to the Desert Runner Trail Series. We will have UltrAspire reusable cups available at registration and on race day or feel free to bring your own! To check them out or purchase one directly, visit our website HERE.

To capture both your pain and euphoria along the way, we will staff out on the course. With our crew, you get photographers who are also runners and understand what your race photos mean to you!

Crews & Pacers
Crews are welcome to support runners at the start/finish line at Ramada 9 in the Turf area.  This will serve as the “Rumble Headquarters” for the duration of the 32 hour event!

Pacers may join runners after loop 3 in the 100 mile race or at sunset, whichever comes first. Pacers may join 52 mile runners for their final short loop of the race.

Awards to the top 3 male & female finishers at each distance.
All finishers will receive a finisher award.
Points earned in the Desert Runner Trail Series.
Buckles to 100 mile finishers.

Volunteer Helpers
If you would like to join our volunteer team, we are looking for help with event setup, aid station captains, aid station helpers, timing, photography, videography, social media, course sweep and event breakdown. Volunteer perks include a piece of Aravaipa merchandise or race goody and Aravaipa Race Credits. You can see our current opportunities and sign up here: Coldwater Rumble Volunteer Form


Entry Fees*

Until 10/13 Until 12/22 Until 1/16 After 1/16
4 Mile $38.08 $43.52 $48.96 $54.40
20 KM $43.52 $48.96 $54.40 $65.28
20 Mile $48.96 $54.40 $59.84 $70.72
52 KM $76.16 $81.60 $87.04 $97.92
52 Mile $108.80 $114.24 $119.68 $130.56
Until 10/13 Until 12/22 Until 1/16 After 1/16
100 Mile $228.48 $255.68 $282.88 $310.08
Save $10 with our no-shirt option! Shirts guaranteed on race day if ordered by 12/22, otherwise shirts will be sold on race day if available.
*prices include tax
Entrant Limit
500 Runners
Entrant Lists

Registration Options
Online via Ultra Signup
100 Mile Mail-in Entry
Other Distances Mail-in Entry

Online registration closes on 1/16 at 11:59 PM. Registration will be available after online registration closes at all packet pickup locations and race day as long as we have not reached our capacity.

Cutoff for all races is 3 PM on Sunday (32 hours for 100 miler).

Intermediate cutoffs:
Headquarters (Mile 60) – 2:00 AM
Headquarters (Mile 80) – 8:30 AM
Pedersen (Mile 91.1) – 12:00 PM
Coldwater (Mile 96.7) – 2:00 PM


All courses feature a wide variety of typical desert trail running surfaces including crushed granite single track, rocks, boulders, sandy washes, old jeep roads, and dry wash beds. Be prepared for a wide variety of conditions from very well defined, to more remote and sandy. Course Photos

100 Mile

Elevation Gain 5,315 Feet | 1,620 Meters

52 Mile

Elevation Gain 3,609 Feet | 1,100 Meters


Elevation Gain 2,067 Feet | 630 Meters

 Course Maps



Elevation Profiles

GPS Files
100M | GPX | KML
52M | GPX | KML
52K | GPX | KML
20M | GPX | KML
20K | GPX | KML
4M | GPX | KML

*Note on GPX & KML files: Right click and select “Save link as…” to download files.
GPX files may be opened by downloading the demo version of TopoFusion for free. KML files may be opened in Google Earth.


Live Results
2018 Live Results Link

Course Records
100M | Male – 15:09:52 – Catlow Shipek (’14) | Female –  20:05:43 – Gina Dhaliwal (’14)
52M | Male – 8:06:51 – Sam Haagenson (’14) | Female – 9:10:38 – Meghan Hicks (’14)
52K | Male – 4:12:52 – Sion Lupowitz (’16) | Female – 4:41:42 – Kelly Wolf (’16)
20M | Male – 2:18:01 – Joshua Trevino (’14) | Female – 2:43:45 – Elissa Sander (’15)
20K | Male – 1:24:58 – Pedro Gomes (’16) | Female – 1:31:22 – Haley Wolf (’15)
4M | Male – 31:14 – Brian Holterhaus (’16) | Female – 31:19 – Katherine Weiss (’15)

Previous Distance Course Records
50M | Male – 7:11:13 – Dave James (’13) | Female – 9:39:34 – Magi Redlich (’13)
50K | Male – 3:57:02 – Brendan Halpin (’13) | Female – 4:29:41 – Polly Campbell (’13)


2017 | 100M | 52M | 52K | 20M | 20K | 4M
2016 | 100M | 52M | 52K | 20M | 20K | 4M
2015 | 100M | 52M | 52K | 20M | 20K | 4M
2014 | 100M | 52M | 52K | 20M | 20K | 4M
2013 | 50M | 50K | 31K | 19K | 4M
2012 | 50K | 31K | 19K | 4M


2017 | Aravaipa Photo Gallery | SweetM Images
2016 | Aravaipa Photo Gallery | SweetM Images
2015 | Aravaipa Photo Gallery
2014 | Aravaipa Photo Gallery
2013 | Aravaipa Photo Gallery
2012 | Aravaipa Photo Gallery| Michael Miller
2011 | Aravaipa Photo Gallery



Race Day Schedule
Please arrive early to park, check in and warm up prior to your run. Restroom facilities are located at the start line as portable restrooms.

Saturday, January 20, 2018
6:00 AM – Packet pickup / race day registration begin
7:00 AM – 100 Mile Start
7:05 AM – Begin civil twilight
7:30 AM – 52 Mile Start
7:32 AM – Sunrise
8:00 AM – 52 Kilometer Start
8:30 AM – 20 Mile Start
8:45 AM – 20 Kilometer Start
9:00 AM – 4 Mile Start
5:49 PM – Sunset
6:16 PM – End civil twilight
9:20 PM – Moonset

Sunday, January 21, 2018
7:05 AM – Begin civil twilight
7:32 AM – Sunrise
3:00 PM – Final 100 Mile Cutoff

Moon Phase Saturday January 20, 2018
9:47 AM – Moonrise
9:20 PM – Moonset

10% illumination – Waxing Crescent

Park Entry Fee
Remember the park charges a $6 park entry fee per vehicle. Please arrive early and have correct change (cash) available on race morning for a smooth entry process. Carpool to save!

Trail Running & Trash
Please respect the trails and the beauty of the desert by disposing of any trash at one of our aid stations.

Race Timing
We will be utilizing a chip timing system at this event to record your time at the finish. You will be provided with a timing chip attached to the back side of your race bib. It is important to not crease, or fold the the timing chip to ensure your finish time is read. Results after each lap will be displayed on a screen at the finish line turnaround.

We will also be placing remote timing points on the course making it easier for crews, friends, and families to follow you on your journey! To access the live updates, visit this link: Aravaipa Running, on race day and click on Coldwater Rumble.

Drop Bags
Drop bags will be allowed at the start/finish and at the Coldwater Aid Station for all racers.  Drop bags will be returned to the start/finish area at the conclusion of the races.

Aid Station Helpers
We cannot produce these trail runs without the help of our amazing volunteer team. You can even help and run on race day. If you would like to join our volunteer team, we are looking for help with event setup, aid station captains, aid station helpers, timing, photography, videography, social media and event breakdown. Volunteer perks include a piece of Aravaipa merchandise or race goody and Aravaipa Race Credits. You can see our current opportunities and sign up here: Coldwater Rumble Volunteer Form

Course Markings
The race courses will be well marked with orange plastic ribbons with black polka dots. Trail junctions and turns will be well marked with colored laminated signs that correspond with your race’s color (4M = Blue, 20K = Green, 20M = Yellow, 52K = Red, 52M = White, 100M = Orange). Please pay attention to these signs at each junction as there are multiple race distances and race courses! In addition, blue & white checkerboard plastic flagging will be hung to designate non-race or “WRONG WAY” trails. All runners are responsible for understanding the layout of the courses. Please familiarize yourself with the course maps on our website prior to race day and/or print a map to bring along with you.

Parking / Start Area
The 2018 start/finish line is again located at Ramada 9 within the Turf Picnic Area. This is only slightly different from past years at Ramada 7 & 8. From the park’s main entrance, you will be directed to go around the road loop (Casey Abbott Drive North to Casey Abbott Drive South just beyond the Nature Center) to access the parking lot associated with Ramada 9 via Chipotle Way. Please be advised, there are road closures within the park as part of the course utilizes the Casey Abbott Drive South near Trailhead Drive and ramada 6 .

Tent sites are available at the Turf Area (Rumble Headquarters) next to the start/finish line for $22 for the weekend (Friday and Saturday nights). You may reserve a camping site with your registration this year. There is a bathroom facility located at the staging area. Purchase Camping Permit 

Tent & Cot Rental
We will be renting tents and cots for use by runners again this year. You may reserve a tent and/or cot when you register for the race.  The tent will be setup when you arrive, so all you have to do is bring your own sleeping bag (or rent one of ours)! The small tents are 7′x7′ and the large tents are 12′x8′. Purchase Tent & Cot Rentals

From central Phoenix, take I-10 west to Estrella Parkway exit. Travel south to Vineyard Ave. Turn east on Vineyard Ave. to the Estrella Mountain Regional Park entrance on the south side.

14805 West Vineyard Avenue
Goodyear, AZ 85338

CR 2015 Web Photo 6 CR 2015 Web Photo 5 CR 2015 Web Photo 4 CR 2015 Web Photo 3 CR 2015 Web Photo 2

Video Credit: Ed Gildersleeve