Wonderland Trail FKT is a 93 miles / 150km ultra marathon in Mount Rainier, United States. Distance: 150km. Elevation: 7,000m D+. Difficulty: challenging (Challenge Rating 56/100). Time limit: 96h. Surface: trail. Established 2000.
Wonderland Trail FKT
Mount Rainier, Washington, United States
"93 miles around Mount Rainier. Glaciers, meadows, and river fords."
A fastpacking circumnavigation of Mount Rainier on the Wonderland Trail.
The Course
The Wonderland Trail circumnavigates Mount Rainier (4,392m) — the most dangerous volcano in the United States and the most heavily glaciated peak in the lower 48. The 150km route crosses old-growth forest, alpine meadows carpeted in wildflowers (July-August), glacial rivers fed by the 25 major glaciers on Rainier's flanks, and passes above 2,000m where the massive volcano dominates every viewpoint. The trail surface is well-maintained by the National Park Service but includes significant river crossings (some with bridges, some without), steep switchbacks, and sections where the volcanic terrain is actively crumbling. FKT attempts require self-support — no aid stations, no crew, just what you carry.
mountainous
loop
Runner Experience
Self-supported race — runners carry all supplies. Checkpoints for timing and safety only.
Intimate finish in a remote setting. The camaraderie of shared hardship creates deep bonds between finishers.
Race Day Weather
12°C
2° – 22°
55%
20%
Pacific Northwest summer — generally dry but unpredictable.
Stats & Records
2000
50
Entry
$0
March
—
Lore & Trivia
The Wonderland Trail FKT (Fastest Known Time) circumnavigates Mount Rainier — a 4,392m active volcano in Washington state that is considered the most dangerous volcano in the United States due to its proximity to Seattle and its massive glaciers. The 150km trail passes through old-growth forest, crosses glacial rivers, and circles the mountain through meadows ablaze with wildflowers in summer. FKT culture — where runners set and break records on self-documented attempts — has made the Wonderland Trail one of the most prestigious targets in American trail running.
- ▸ Mount Rainier is the most glaciated peak in the contiguous US.
- ▸ The Wonderland Trail was established in 1915.
- ▸ River crossings can be waist-deep after warm days.
- ▸ Established in 2000.
- ▸ Total elevation gain: 7000m.
The Wonderland Trail circles Mount Rainier — 150km around one of the most dangerous volcanoes on earth. Beautiful and slightly terrifying.
Notable Editions
The Pandemic FKT Rush
COVID-19 closures of organised races drove elite runners to FKT attempts on classic trails, and the Wonderland Trail saw multiple record-setting runs. The pandemic paradoxically produced the fastest circumnavigation of Rainier in history.
Compare with another race
Similar Races
3 OCT 2026
Angeles Crest 100
Wrightwood, United States
1 MAY 2026
Badwater 135
Death Valley, United States
8 MAY 2026
Bandera 50K
Bandera, United States
MAR
Barkley Marathons
Frozen Head State Park, United States
Frequently Asked Questions
How long is Wonderland Trail FKT? +
Wonderland Trail FKT is a 93 miles / 150km (150km) ultra marathon with 7,000m of elevation gain. The course is loop on trail terrain.
How hard is Wonderland Trail FKT? +
Wonderland Trail FKT is rated challenging with a Challenge Rating of 56/100 (Challenging). Runners have 96 hours to finish.
What is the weather like at Wonderland Trail FKT? +
Average temperature is 12°C (range 2°C to 22°C) with 55% humidity and a 20% chance of rain. Pacific Northwest summer — generally dry but unpredictable.
Are crew and pacers allowed at Wonderland Trail FKT? +
No crew access is permitted. Pacers are not allowed. Mandatory gear is required.
Are you the organizer? Claim this race
Stay in the loop
New races, course records, and stories from the trail — monthly