100 Mile Race Details

Start of the 100 mile race at Stearns Park, Ludington on Lake MichiganThe 100-mile Coast Loop gravel grinder, like its longer brother Coast to Coast, is a challenging, roller coaster ride on gravel (more packed dirt than gravel), two-track roads, and a little pavement when you need a breather! Note that this race is self-supported. A support crew can meet you at and only at the official Big M checkpoint if desired. You must have a rescue vehicle within reach in case you need to drop out or if the race gets cancelled during the event due to severe weather. We do not offer rescue vehicles.

  • Date: Saturday, June 22, 2024
  • Start and Finish: Stearns Park Beach, Ludington, MI
  • Route: Ludington-Manistee National Forest 100-mile loop
  • Portion in Manistee National Forest: 40%!
  • Percentage of gravel: 85%+ (even a bit of gravel-bike friendly singletrack)
  • Elevation Gain: approx. 2,600 ft (Strava/Ride with GPS are inaccurate)
  • Support: Self-supported. A support crew can meet you at the official checkpoint if desired. You must have someone who can drive you back if you drop out.

rider on 200 mile course in Manistee National ForestCourse Design
We’ve teamed up with top Midwest endurance racer Matt Acker, co-course designer, who knows Michigan’s gravel roads and gravel racing better than anyone, to create a course you will be sure to love, highlighted by gravel and challenging, scenic seasonal roads. It covers an incredible 40+ miles of Manistee National Forest gravel and two-tracks and shares the last 45 miles with the 204-mile race.

After a fast, flat start out of Ludington, at mile 28 you enter the Manistee National Forest and its forest service roads that set both Coast races apart from almost all other gravel grinders. Twisty, rolling, so much fun. At your checkpoint at Big M Rec Area you meet up with the 204-mile route, and then tackle a little gravel-friendly singletrack and beautiful Big M gravel roads. After climbing out of the Little Manistee River drainage, it’s a subtle but decidedly downhill trend to the finish in Ludington. You’ve earned it.

sunset and breakwater lighthouse at Stearns Park, Ludington, on Lake Michigan100 miles is a major achievement. With a start and finish in Ludington, it’s a great option if you don’t have a support crew, aren’t ready for the 204, or want to race and then cheer on a friend or family member finishing their 204. Because the route both leaves and returns to Ludington, you’ll have about 7-9 miles of flat pavement at both the start and finish which will make the race more doable. Finish your race in one of the great outdoor towns in the country, Ludington, touching the waters of Lake Michigan and completing your amazing adventure.

Our design philosophy is to provide the best combination of scenery, dirt surfaces, safe roads and fun riding while minimizing sandy sections and paved and/or higher traffic riding (you’ll see very few vehicles on the course). Depending on drought conditions and ORV traffic which is now allowed on US Forest Service roads, there will be some stretches of sand so we recommend going with the widest tire you can on your bike, particularly if the course does not receive much rain in the weeks leading up to the race. Those who ride at or wider than 44mm or 2″ get through the sand well. We will do our best in the weeks leading up to the race to alert you to road surface conditions as they can change fairly considerably depending on rain, drought and ORV traffic before the race. When in doubt, go with wider tires and bring extra water. Riders never regret this.

I arrive at the finish a better person. – Rebecca Rusch, world champion mountain biker (and gravel road lover)

Ludington provides an ideal finish town with restaurants, breweries, lodging, an amazing state park and maybe the best sunset in the U.S. Some of you will be able to get home Saturday night, but staying in Ludington would be a well-deserved reward!

Finish Rates
2024: 154 of 235, 66%
2023: 232 of 250, 93%
2022: 149 of 176, 85%
2021: 179 of 200, 90%
2019: 139 of 152, 91%
2018: 124 of 135, 92%

Swag & Finisher Awards

  • All racers will receive your choice of one of the following:
    1) Race t-shirt (poly/cotton/rayon blend; available through approx. 6/6). Men’s/unisex shirt sizing  Women’s vneck shirt sizing
    2) SockGuy 4″ SGX race socks or
    3) Water bottle (limited quantity)
  • All riders will receive a 100-mile sticker/decal.
  • See the top finisher prizes page for podium awards.

Support & Aid

  • This race is unsupported/self-supported.
  • You may meet a support crew at the Big M Rec Area (Mile 66) checkpoint if you wish but at no other point (unless you are withdrawing).
  • You may NOT swap a bike or wheel at the checkpoint.
  • The Coast Loop does not require a support vehicle but you must have a “rescue” vehicle to get back to the finish if you drop out. This is your responsibility.
  • Water (spigot or purchase) and food are on the course at Mile 53 in Dublin, at either the Dublin General Store or Marathon Gas Station. Water will also be available at the Big M checkpoint at Mile 66.

Riders on gravel road on routeRoute Finding

  • You are responsible for following the course directions via provided gpx file (Ride with GPS and Strava formats for your bike computer) and cue sheets under the Routes page. ALL riders must have at least cue sheets but we recommend a bike computer as well.
  • There will NOT be signs on the course (except some streamer posts at certain unclear forest road intersections). See the Route page for details.

Endurance is all about heart. — Bear Grylls


Schedule for Saturday, June 22

  • Check-in/packet pickup: Stearns Park Beach, 6:30-7:45 am (no Friday packet pickup)
  • Start: 8:00 am, Stearns Park
  • Checkpoint: Big M Recreation Area, mile 65
    • Fastest rider projection: 11:00 am
    • Cut-off (must leave by): 10:55 pm
  • Finish: before 2:30 a.m. 🙂 Stearns Park
    • Fastest rider projection: 12:42 pm


  • Awards will be giving out as podiums fill. If you missed your award, come find us at the finish line.
  • We will provide a really tasty Q Smokehouse pulled pork & pasta & cheese meal. My favorite BBQ and sauce! Food is also available at the concession store right next to the finish until 7 pm. Or, lots of great options downtown, just 1 mile away.
  • Your crew or spectators can purchase a meal on the website.


  • Stearns Park Beach, Ludington (north side, enter from north)
  • Touch Lake Michigan to start and finish your quest!

Lodging Recommendations

Logo shirts and extra race shirts and socks will be available for purchase on the registration site under Purchase Event Items. You’ll pick up at the race. We will have limited quantities available at check-in and finish so we recommend pre-ordering.

  • Extra shirt or socks, $15.
  • Jersey, bib, and cap available on BikeReg registration site through the Borah store in the spring. Open for a few weeks. Will ship to you.

Community Facebook Group
Join the racer forum to connect with other riders, seek support crew, transportation to/from the start, and to have questions answered from veteran endurance riders.