One loop from and back to Deep Creek, identical to Loop 1 of the Plain 100 Mile: via Maverick Saddle, Mad Lake/Hi Yu/Lost Lake/Blue Creek trails, a Klone Peak out-and-back spur, North Tommy, Lake Creek/South Tommy, and the hard climb to Tyee, then back through Maverick Saddle to Deep Creek. Added in 2014. No aid stations, no course markings, no pacers.
Distance is left null: the race markets this course only as "the 100K" and states it is "just the first loop of the Plain 100 mile race," but no separate official mileage for that loop alone is published anywhere found; the only measured figure available (102.08 mi via CalTopo) is for the closed FULL two-loop 100-Mile track, not this course, so it is not reused here. Elevation is likewise not separately published for this course; the combined "roughly 21,000 feet" figure found is described as covering the Plain races generally and was not confidently attributable to the 100K alone, so published_gain/published_loss are left null here (unlike the 100 Mile course, where the same figure was used as the whole-course total).
A 100+ mile (100 Mile) and 100K self-supported ultramarathon on U.S. Forest Service trails and roads in the Cascade Mountains near Plain and Leavenworth, Washington. There are no aid stations, no course markings and no pacers; runners navigate by written directions and a paper map, filter their own water from streams, and check in with Search and Rescue volunteers at staffed checkpoints using a bib number and password. The 100 Mile is two laps of the same Deep Creek start/finish, each lap a different route; the 100K, added in 2014, is the first lap only.
Founded in 1997 by Tom Ripley and Christina Ralph of the Cascade Running Club (which also directed the Ron Herzog 50K, White River 50 Miler and Bridle Trails Twilight 8 Hour) as Washington's first 100-mile trail race, three weeks apart from Cascade Crest 100 the same year. Six runners started the first race; a snowstorm above 6,500 feet ended it early with no finishers. The first finishers were Tim Stroh and Randy Gerke in 1998; Liz McGroff became the first woman finisher in 2002. The original start/finish was Thousand Trails Lodge; in 2011 it moved to Deep Creek, with an added out-and-back spur to Thousand Trails to keep the distance the same, and the race course has not changed since. A 100K (the first loop only) was added in 2014. Wildfires cancelled the race in 2003 and 2015; in 2014 a wildfire forced a course modification that dropped the Tommy and Tyee checkpoints and added a foot-access-only Whistling Pig Meadow checkpoint; 2020 was cancelled for COVID-19; 2018, 2022 and 2026 were cancelled for wildfire. Tom Ripley and Christina Ralph retired as race directors in 2015, handing the race to long-time participant and SAR Support Team Commander Tim Stroh together with Tim Dehnhoff.
| Mile | Station | Cutoff | Crew | Bag | Pacer | Med | To next |
|---|---|---|---|---|---|---|---|
| 0.00 | Deep Creek | ? | ● | ● | · | ? | ? |
| ? | Maverick Saddle | ? | · | · | · | ? | ? |
| ? | North Tommy | 2:30pm | · | · | · | ? | ? |
| ? | Lake Creek | ? | · | · | · | ? | ? |
| ? | Tyee | 10:00pm | · | · | · | ? | ? |
| ? | Maverick Saddle | ? | · | · | · | ? | ? |
| ? | Deep Creek | 3:00am | ● | ● | · | ? | ? |
From Lake Wenatchee Rec Club (race headquarters): turn left on Chiwawa Loop Rd, at 4 miles turn left onto Lower Chiwawa Loop Rd (FS 6100), at 9.6 miles turn right at the 'T' intersection, arrive at Deep Creek after 100 feet on the right side of the road. About 15 minutes travel time from LWRC. Only park on one side of the road to leave room for other vehicles.
Parking. Limited parking along the road; park on one side only. Sleeping in vehicles and motor homes are both allowed. Stay off the adjacent airfield.
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