From Swan Mill Rd, Duvall to Swan Mill Rd, Carnation, King County, Washington
20.63 mi
Length
2,260 ft
Elev gain
2,300 ft
Elev loss
1,165 ft
Max elevation
gravel 100%

Elevation Click the profile for Street View

20 Miles of Markworth is a 20.6-mile gravel route in Washington that runs from Duvall to Carnation. It includes 2,260 feet of climbing and 2,300 feet of descent. The route is a loop and is 100% gravel. AI-generated description — details may not be fully accurate.
2 votes
 Gerald Hawkins
on May 26, 2023
Drunken Charlie Lake is also a good destination. Navigating to it is a bit of a challenge but the hill up to the lake is also a challenge. (The lake itself is not an attraction.) Just past the lake are some excellent views from a 500m ridge line.
 Alex Hawley
on January 31, 2021
I'd skip that first left at about 2 miles in and just continue straight on the main road. I went about 1/2 mile down that way and it was in bad shape. Lots and lots of trees down and really overgrown. Not sure how it was when this was first recorded but oof, it's no bueno in there right now.
 Tayler Brooks
on September 21, 2020
My favorite go-to post-work ride. Thanks, Andy!