start your next race, right here, with Turnsheet.

It’s like getting intel and advice from a ten-time finisher.

We’re all about telling a race’s full story and capturing the idiosyncrasies that make it unique. That’s why we collect all sorts of race-related information — beyond the usual mix of location, date and distance — and put it in one place. We doubt you’ll find a more complete view of an event.

Hopefully, Turnsheet will make your next race a little easier to discover and conquer.

 

Get ready to be surprised by what you find.

Fair warning: your bucket list will fill up fast.

We wouldn't exactly call Turnsheet a thrift store, but we do hope you’ll discover something you didn’t know you wanted until you saw it. Perhaps it’s a Southeast out-and-back with sneaky vertical or an Arizona loop that’ll get you tan in February.

Start searching for that hidden gem here: our difficulty rankings of North American 100-mile races. We combine a variety of course-related data to estimate and rank the difficulty of races across the country. (Learn how we rank.) If you click on a race’s difficulty score, you can see what’s behind the numbers — all those idiosyncrasies we mentioned earlier.

 
Rank Race Difficulty Location Total Ascent Avg. Elevation Tallest Climb
1 Hardrock 96.0% Silverton, CO 36,000 10,900 5,088
2 Ouray 95.4% Ouray, CO 41,200 10,100 4,469
3 Whistler Alpine 84.7% Whistler, BC 31,500 4,800 4,500
4 Teanaway Country 83.5% Salmon La Sac, WA 32,700 4,700 3,123
5 Wyoming Range 83.4% Jackson, WY 28,700 8,700 3,087
6 Wasatch Front 82.3% Salt Lake City, UT 24,800 7,800 4,455
7 High Lonesome 79.0% Nathrop, CO 23,000 10,400 4,882
8 Plain 77.2% Plain, WA 26,000 4,200 4,518
9 Fat Dog 77.1% Manning Park, BC 29,000 4,500 4,797
10 Cruel Jewel 74.3% Blairsville, GA 33,000 2,700 2,113
11 Scout Mountain 73.4% Pocatello, ID 23,500 6,200 3,468
12 Old Cascadia 72.8% Black Butte, OR 27,600 4,000 2,884
13 Bear 71.6% Logan, UT 22,700 7,300 3,307
14 Palisades - Moose 70.6% Irwin, ID 23,500 6,900 3,593
15 Cascade Crest 70.1% Easton, WA 25,300 3,900 3,166
16 Pine to Palm 68.4% Ashland, OR 22,900 4,500 4,495
17 Bighorn 67.5% Sheridan, WY 21,000 6,600 4,700
18 Run Rabbit Run 65.2% Steamboat Springs, CO 18,800 9,000 3,881
19 Orcas Island 64.7% Orcas Island, WA 26,000 1,200 1,640
20 Grindstone 62.6% Swoope, VA 23,100 2,900 2,395
21 Tahoe Rim Trail 60.8% Glenbrook, NV 20,200 8,000 1,998
22 Angeles Crest 59.9% Wrightwood, CA 20,600 3,500 3,536
23 Leadville Trail 59.7% Leadville, CO 17,300 10,100 3,661
24 IMTUF 58.3% Burgdorf, ID 18,600 6,400 2,549
25 HURT 57.7% Honolulu, HI 24,500 1,100 1,428
26 Bryce Canyon 56.7% Proctor Canyon, UT 17,700 8,300 1,500
27 Mogollon Monster 53.0% Pine, AZ 17,500 6,700 2,377
28 Eastern States 52.0% Waterville, PA 20,800 1,500 1,300
29 Western States 52.0% Auburn, CA 18,000 3,900 2,352
30 Black Hills 51.1% Sturgis, SD 18,000 4,600 1,010
31 MMT 47.1% Fort Valley, VA 18,500 1,700 1,604
32 San Diego 44.7% Lake Cuyamaca, CA 16,500 5,100 1,946
33 Zion 38.6% Virgin, UT 13,000 4,300 2,090
34 Mountain Lakes 35.1% Olallie Lake, OR 12,800 4,300 2,152
35 Pinhoti 34.8% Heflin, AL 16,400 1,100 1,089