Starting at Stinson Beach, this route links Mt Tam with Mt Diablo, the two most significant summits for runners in the Bay Area.  Any route may be used, but Von Stroh recommends the following (105km):

Stephen Bohn submitted this clever challenge:

"18 loops (or "holes") around the McCabe Golf Course on the Richland Creek Greenway for 50 miles."

Start: Savage River Trail parking lot in Denali National Park. Went up past the rock outcropping to the top of the mountain. Followed the ridge line all the way to Mount Healy. Then went down the mountain on the Mt. Healy Overlook trail. Finish: at the Denali National Park Visitor Center.  Note that the FKT route does not summit Mt Healy, which is technical.

Description from the NPS: