Boulder-DeRoux Trail is a 9.8 mile out and back trail located near Roslyn, WA and is rated as moderate. The trail is primarily used for hiking and is accessible from March until November.
We hiked in the middle of October & the colours were incredible. We went all the way into Gallagher Lake & it was round trip a 5 hour hike. Lots of cars in the parking lot, but barely saw anyone on the trail. Lots of creeks for the dogs to drink. Cant wait to do it again in the Spring.