28-Mile Course Map, Profile and Description

2019 28 mile course map

2019 28-mile profileThis recreation event is authorized under a Special Use Permit with the Bridger-Teton National Forest.

28-Mile Course Description: Start and finish at the Green River Lakes Road Parking area and follow the N loop. The racecourse is approximately 28 miles and has 2600 feet of elevation gain and loss.

28-Mile Marathon Section 1: Start to Dollar Lake 

9 miles and 325-foot elevation gain

Racers will start by heading north along the road following the Green River for about 9 miles to Dollar Lake. This section of the course is fairly flat, wide, fast (depending on snow conditions) and easy to follow.  There will be a volunteer at the 13 miler turn around point which is 6.6 miles from the start. There will be no aid, until the Moose-Gypsum intersection station. If you are struggling, this is where you should turn around as it only gets harder from here. Anyone dropping from the race beyond Dollar Lakes will be required to take a snowmachine ride out and donate $50 to Tip Top Search and Rescue.

28-Mile Marathon Section 2: Dollar Lake to Moose-Gypsum Intersection

(Aid Station 1)

4.5 miles and 300-foot elevation gain

From Dollar Lake the trail continues North and then turns East following the river.  Watch for and enjoy (but do not approach) elk in this area. At no time are racers allowed to leave the trail, this is a protected area. Your actions reflect this race-follow the rules, and respect any and all wildlife you encounter. There will be an aid station here with water and a few basic snacks. Fill up here-you’ll want snacks and stuff before the climb.

28-Mile Section 3: Moose-Gypsum intersection to Gypsum Creek

(Aid Station 2)

8.3 miles and 1350-foot elevation gain and 750-foot elevation loss

Racers will turn right on Moose-Gypsum road, shortly thereafter begins the biggest climb of the course. Pay attention to your temperature here, do not soak clothes with sweat or the descent to the finish line will be a cold one! Watch for and enjoy (but do not approach) elk in this area. At no time are racers allowed to leave the trail, this is a protected area. Your actions reflect this race-follow the rules, and respect any and all wildlife you encounter. Racers will gain 1200 feet over the next 4.3 miles to the course high point of 9200 feet. Give yourself a pat on the back, it’s downhill from here…mostly. The course flattens out for about a half-mile before starting a gradual 3.5-mile 600-foot descent to the Gypsum Creek Aid Station, only 6.6 miles from the finish.

28-Mile Marathon Section 4:  Gypsum Creek Aid Station to Finish

6.6 miles and 700-foot elevation gain and 1600-foot elevation loss

The course stays flat for about a mile before a 400-foot descent and then climbs over 2.5 miles. Be sure to layer up for a fast 3-mile 1000-foot descent to the finish line!

28-Mile Marathon Aid Stations

There are two aid stations. Racers must check in at each aid station. Both will have race volunteers, satellite communication and basic first aid kits. While you may be able to grab a snack and top off your water, you need to be self-sufficient at this race. Do not rely on aid stations for safety, food, water, or major medical needs. This is a cupless race. Aid Stations are mandatory. If you do not stop and check in at an aid station, you will be called in as missing and a search party will be dispatched immediately. Remember cut-off times are strict!

AS1: Moose-Gypsum Intersection: Mile 13.5 – Closes at 1 pm, 4 hours after race start.

AS2: Gypsum Creek: Mile 21.8 Closes at 3 pm, 7 hours after race start.

Finish line: Closes at 5 pm, 9 hours after race start. All racers must be off the course by 5 pm.

  • Drifters may leave the course on their own accord if they are able to before Dollar Lake. Drifters that do not make the Moose-Gypsum Intersection or Gypsum Creek Aid Station cut-off times will leave the course by snowmachine and donate $50 to Tip Top Search and Rescue. In the event of snow machine evacuation at any point along the race course, Drifters will be required to make a $50 donation to Tip Top Search and Rescue. Drifters who do not check in to either aid station or pass the finish line by 5 pm will be declared missing and a search party will be deployed immediately. Do not leave the race course.

13-Mile Course Map, Profile and Description

2019 13-mile course map

2019 13-mile course profile

This recreation event is authorized under a Special Use Permit with the Bridger-Teton National Forest.

13-Mile Course Description:

This course is wide flat and fast….depending on the snow. Racers will head north from the start along the N trail. Just over three miles in your will pass the Union Pass Road marking the near halfway point to the turn-around. Continue straight, eventually pulling away from the river. The turn-around is just past the old Gros Ventre Lodge (and private cabin) 6.6 miles from the start. Racers will return to the finish the way they came. Racers must check in at the turn-around. Water and basic snacks will be available. Anyone unable to finish will take a snowmachine ride out will be required to pay $50 to Tip Top Search and Rescue.