Boulder Creek Loop

Olympic National Park, Washington, United States

34.7 miles (55.9 km) · 11,056 ft elevation gain · Lollipop · Route

The Boulder Creek Loop route traverses 34.7 miles through Olympic National Park, Washington, United States. Elevation gain totals 11,056 feet, with 11,095 feet of descent. The largest climb extends 8.0 miles, gaining 4,435 feet. The course averages 445 feet of vertical gain per mile. About 39% of the distance is runnable terrain. Terrain difficulty is rated as mountainous. Difficulty is rated 20.8 out of 10, placing it in the 87.36th percentile. Popular among runners preparing for distance events.