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37-Mile Course Key Stats (scroll down for 24- and 9-Mile courses)

  • Elevation Gain: approx. 2,400 ft. (by GPS).
  • Clockwise flow (Tuesday, Thursday, Saturday flow)
  • GPS track files: sign in and then use Strava link or click on View Full Version in map below, select Export on right, download GPX or TCX (turn by turn, for newer devices) file. Garmin instructionsStrava instructions.
  • Course Map PDF
  • Pre-rides: See details below. Please start at Yankee Springs Township Hall. Note hike-a-bike up hill at edge of Gun Lake Rd.
  • Aid Station: Mile 17 (Otis Lake Audobon Farm). Gatorade and water.
  • Designers: Mark VanTongeren & Matt Acker


  • Tuesday, Thursday or Saturday for the correct flow (Yankee Springs Deep Lake trail switches flow daily).
  • Start at Thornapple Township Hall a short ways south of Camp Manitou-Lin on Briggs. Please stay off camp property except on race day.
  • Refill water at Deep Lake Campground. Bring plenty as there are no public water sources the rest of the way.
  • Note that the GPS file may be confused when you hike-a-bike up the hill where the Deep Lake singletrack arrives at Gun Lake Rd. Bring cue sheets with you if you don’t know the route.
  • No bike computer? Print PDF or select Print from Strava link to get cue sheet (ignore singletrack info)
  • Now a segment on Strava. Go get it.

Course Markings

  • All race courses will be marked with directional arrows.
  • The 24- and 37-mile courses will have volunteers or sheriff monitors at busy intersections in addition to arrows. Some intersections may only have arrows. Racers are still responsible for crossing when safe to do so.
  • We highly recommend that you print the Strava Cue Sheet or map in case signs fall down or are stolen.
  • GPX/TXC tracks are not required but may be helpful if you have a navigation device.

Cue Sheet
Cue sheet (turn-by-turn instructions) for gravel road section. Use the Strava map and click Print and then reference our maps showing the Deep Lake Mountain Bike trails for the singletrack sections since cue sheets don’t cover the singletrack trails.

It’s a dangerous business, going out your door. You step onto the road, and if you don’t keep your feet, there’s no knowing where you might be swept off to.

Course Description

  • Roll-Out and First Singletrack Section: After a 5-mile roll-out from Camp Manitou-Lin on mostly gravel, you will climb the infamous Bassett Lake Road hill. If you aren’t thinned out by now, this hill will certainly thin out the herd. Look for the Section C medical sign for your turn-off to the right (and signs on race day of course) where you’ll enter into the famous and revered Deep Lake mountain bike trail system at The Pines for 5 miles of fast fun. Take a quick left and follow the trail along the road before turning right and climbing into the ridge of pines. After some intermediate-level riding with a few moderately technical spots (watch rocky descent video here for one of these spots; nothing crazy relative to other trails in the lower peninsula), the most challenging of the day, you’ll have some windy but fast trail. As you approach the campground, keep some off-shoot trails to your left. You’ll follow the normal Saturday flow which is clockwise (opposite from the traditional flow), taking the trail eastward toward Deep Lake and then south, with a 20-feet hike-a-bike up the hill to Gun Lake Road just before the creek, just west of Yankee Springs Rd.
  • The 24-mile route will turn right/south at Yankee Springs Rd and then right again at Duffy to rejoin the 37-mile race (minus 13 miles of gravel and two tracks). The 37-mile route goes straight/east on Gun Lake Rd.
  • Gravel & Two-Tracks: Enjoy some wider stretches over the next 17 miles, although a few will feel like singletrack in their rugged surface and need for picking the right line. You’ll head east, with a steady climb on pavement before accessing several miles of awesome gravel, including the beautiful Audobon Sanctuary where the aid station will offer water and Gatorade (sorry, no Lambas bread). After surviving the infamous Sager Road (our version of Mordor perhaps?), you’ll hammer a few more miles of paved and gravel roads throughout Middle Earth.
  • Final Singletrack Section & Finish: You’ll finish the race with a final 3 miles of pure Deep Lake awesomeness, entering in at Graves Hill and exiting at The Pines where you first entered back at mile 5. Plummet down the Bassett Lake Road hill, but make sure you stay in control! Finish in reverse of your first 5 miles on mostly flat gravel and a final push on pavement until you reach camp, aka The Shire.


9-Mile Course Key Stats
Mileage: 9.4 miles
Elevation Gain: 178 feet (mostly flat)
Out and back flow (looped routes would require biking on 55 mph paved roads)
Aid Station: No aid stations on this short course

Kids Loop Key Stats
Mileage: 0.3 miles (as many loops as they can do in 15 minutes)

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