December ultramarathons in United States (Pacific North West)

Steep 0.35-mile loop with 89 meters elevation gain per lap, repeated up to 100 times for Everest-equivalent climbing and cumulative elevation awards

3.33 km loop course on asphalt and gravel with two climbs per lap, 120 feet elevation gain, start and finish at the bottom of the soap box derby hill

Casual, no-fee winter run on icy terrain with a low-key, unsupported atmosphere

Scenic Cedar River Trail route with 16 miles of packed gravel, 15 miles of paved bike path, gentle hill at mile 21, start and finish at Landsburg Park

Rugged technical trails through dense forests and along dramatic coastal bluffs, with challenging grades and a crossing of the Deception Pass Bridge

Flat single-track trails alongside the Willamette River, looped course with tranquil river views and smooth, approachable terrain

Winter Solstice laps on a fatass-style course, self-paced on trail terrain with on-site nutrition support

Scenic 5K looped trail at Fort Steilacoom Park with 3, 6, and 8 hour timed run options and convenient access to personal aid stations