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. All courses and the start/finish line are new in 2014. 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!
Thursday, January 23
Packet Pickup 4:00-7:00PM
Group run 5:30-6:30PM
4730 E. Indian School Rd. #125
Phoenix, AZ 85018
Friday, January 24 - 4:00 - 6:00PM
Estrella Mountain Regional Park
Saturday, January 19 – 6:00 - 8:15AM
Estrella Mountain Regional Park
Aid stations every 3.2-6.6 miles (mile 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. Aid Station Helper Signup Form
Our finish line aid station will feature quesadillas made with Daiya Cheese at this year’s race. Daiya cheese melts, stretches, and tastes just like dairy-based cheese! It is free of dairy (casein and lactose), soy, gluten, eggs, rice, peanuts, and tree nuts (except coconut oil). If you’ve never given Daiya a try, you’ll have your chance at the Coldwater Rumble!
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.
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 3.2-6.6 miles
Post race food & socializing
Awards to top male & female finishers at each distance. All finishers receive a finisher’s pint glass. 100 mile finishers will receive a Coldwater Rumble belt buckle. Winners of the trail series (20M) & ultra series (52K/mile) earn free entry into the DRT Series Championship in March at Mesquite Canyon.
This event would not be possible without the generous support of our volunteers. We have plenty of volunteer opportunities available including aid station support, timing, registration, finish line support, breakdown, and course sweep. Signup at iVolunteer Online today.
|Until 11/29||Until 12/27||Until 1/21||Race Day|
|Until 11/1||Until 12/27||Until 1/21||Race Day|
Overall 32 hour cutoff for the 100 miler. Intermediate cutoffs will be posted prior to race day.
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. The park has made some great improvements in the trails in the past year and this new race course will feature less dry, sandy wash running!
Course Detail (Maps, Elevation Profiles, GPS Tracks)
100M | Elevation Profile | GPX | KML
52M | Elevation Profile | GPX | KML
52K | Elevation Profile | GPX | KML
20M | Elevation Profile | GPX | KML
20K | Elevation Profile | GPX | KML
4M | Elevation Profile |GPX | KML
*Note on GPX files: Right click and select “Save link as…” to download GPX files. GPX files may be opened by downloading the demo version of TopoFusion for free.
100M | New in 2014
52M | New course in 2014
52K | New course in 2014
20M | New course in 2014
20K | New course in 2014
4M | New course in 2014
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. There is a permanent park restroom at the rodeo arena parking lot close by.
Saturday, January 25, 2014
6:00 AM – Packet pickup / race day registration begin
7:00 AM – 100 Mile Start
7:03 AM – Begin civil twilight
7:30 AM – 52 Mile Start
7:30 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
5:54 PM – Sunset
6:21 PM – End civil twilight
Sunday, January 26, 2014
3:09 AM – Moonrise (waning crescent with 23 % of Moon’s visible disk illuminated)
7:03 AM – Begin civil twilight
7:29 AM – Sunrise
3:00 PM – Final 100 Mile Cutoff
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.
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.
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. If you are interested in helping with the San Tan Scramble, we have opportunities to help with setup, registration, aid stations, finish line, course sweep and breakdown. All volunteers will receive an Aravaipa Running shirt and a discount on a future race entry! You can even help and run on race day.
Premium volunteer - we now have a premium volunteer position available in the timing tent. Must be technologically minded and be able to multitask. $80 race credit for an 8 hour shift.
Sign Up Here with iVolunteerOnline
Each course will be well marked with orange plastic ribbons with black polka dots. Trail junctions and turns will be well marked with colorful laminated signs. Please pay attention to these signs at each junction as there are multiple race distances and race courses! Course signs will correspond with your bib color (4M = Blue, 20K = Green, 20M = Yellow, 52K = Red, 52M = White, 100M = Orange). In addition, blue & white checkerboard plastic flagging will be hung along with “WRONG WAY” signs to designate non-race 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 start/finish line is located at Ramada 9 in the Turf Area. Once you enter the park through the entry station, turn right onto Casey Abbott Drive South just past the Turf Picnic Area. The next left will be Chipotle Way – turn left and park in the Ramada 9 parking area.
Tent sites are available at the Turf Area (Rumble Headquarters) next to the start/finish line for $20 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.
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′.
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
Turn Sheet & Aid Station Distances
These are currently the 2013 turn sheets – updated turn sheets coming soon! All distances are estimates based upon GPS data.