Saturday, Aug 14, 2021 @ 5:00 AM
This Event Took Place Sat. Aug 14, 2021

Live Runner Tracking

For the 100-Miler:

For the 100K:

The 50-Miler, 25-Miler, 13.5-Miler, 11.5-Miler, & 5K will not have live tracking this year.

Welcome to Cool Moon 100

The local, 100-mile alternative... 37 hours to finish and earn the one of a kind silver buckle created by legendary Silversmith James Stegman of Comstock Heritage in Reno.


The 100-miler starts at 5:00am on Saturday, June 10th, 2023 at the Cool Staging Area (7200 Saint Florian Court, Cool, CA 95614). Parking is free and included in your registration.

Questions? Ask the Race Director, Martin Sengo, by clicking the "Ask a Question" button on this page.


The course consists of a 13.5-mile loop and an 11.5-mile loop, upon which runners will alternate. Each runner will complete (4) 13.5-mile loops and (4) 11.5-mile loops to achieve the 100-mile distance. Runners will start North on a 13.5-mile, counter-clockwise loop from Cool Firehouse, head west to Pig Farm and Salt Creek, south toward the American River and back into Cool. Next, they will follow an 11.5-mile loop from Cool Firehouse South toward Northside School, to Knickerbocker, to the Rim Trail, past the radio towers, back to Northside School and Knickerbocker, and back to Cool. This course is not easy, do not take it lightly.

The course consists of single track and fire roads.

13.5-mile Loop elevation approximately 2200′
11.5-mile Loop elevation approximately 1150′

100-miler total elevation gain/loss approximately 13,600 feet.

Cut-off times

1. At 2:00pm (33:00 hours) on Sunday, June 11th at mile 88.5 at Cool Staging Area.

2. At 6:00pm (37:00 hours) on Sunday, June 11th at mile 100.0 at Cool Staging Area.

Runners who do not meet these two cut-off times will be required to turn in their bib as DNF and will not continue on the course.

Aid Stations

On the North 13.5 Mile Loop the aid stations are:
The Ranch at mile 4.5 (full)
Top of Dam Switchbacks at mile 8.8 (water only)
Knickerbocker at mile 10 (full)
The Ranch at mile 12.3 (full)
Cool Staging Area at mile 13.5 (full) start/finish area

On the South 11.5 Mile Loop the aid stations are:
Knickerbocker at mile 16 (full)
Pilot Hill at mile 19 (water only)
Catecroft at mile 20.5 (full)
Knickerbocker at mile 23 (full)
Cool Staging Area at mile 25 (full) start/finish area

Packet Pickup

Packet Pickup will be on Friday afternoon on June 9th, 2023 at The Aid Station at 927 Lincoln Way, Auburn, CA 95603 between 3-6 pm. We will also have race morning packet pickup 4:00-5:00am for 100-mile runners at the Start Area.


All 100-mile finishers will be awarded with a handcrafted Comstock Heritage finisher's buckle, shirt, and finisher's medal.

Top-3 Overall Male and Female finishers will receive custom award plaques.

Pacers and Crew

Pacers are allowed only after the runner completes the third loop (at mile 38.5).

Crews are restricted to the Cool Staging Area (Start/Finish) and may aid their runner after completion of each loop.


13.5 Mile North Loop (Pink Ribbons):

11.5 Mile South Loop (Yellow Ribbons):

Local time: 10:54 AM


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