Twin Sisters (WA)

Whatcom County, Washington, United States

13.1 miles (21.1 km) · 4,642 ft elevation gain · Loop · trail · Route

Twin Sisters (WA) is a 13.1-mile loop route in Whatcom County, Washington, United States, gaining 4,694 feet of elevation. The route follows a up-and-over elevation profile. The terrain breaks into 4 distinct sections including 2 significant climbs. The longest climb covers 5.4 miles gaining 3,777 feet at an average 12.9% grade. Only 21% of the terrain is runnable — expect substantial hiking throughout. The route opens with a climb and finishes with a descent.