The trail follows Flagline Nordic ski trail from Swampy Lakes to Big Meadow. Recently reconstructed and rerouted to skirt the Bend Watershed. Popular with hardy mountain bikers as one of several long loops from Tumalo Falls Trailhead by riding up the North Fork Trail #24.2 (uphill only for bikes), across the newly constructed Metolious-Windigo Horse Trail #99, then down Flagline Trail #41, and back to Tumalo Falls via Swampy Lakes Trail #23 and South Fork Trail #25. Prior to 15 August, riders must detour via Flagline Access Trail #40.1, Swampy-Dutchman Trail #40, and Flagline Tie Trail #40.3. These arduous 20-25 mile loops follow steep streams and pass through old growth forest. A shorter loop, suitable for hikers or bikers after 15 August, travels around Tumalo Mountain from Dutchman Trailhead.

Directions: From Bend: All summer use of this trail is closed until 15 August each year between Flagline Access Trail #40.1 and Flagline Tie Trail #40.3, to protect elk calving habitat. Flagline Trail can be reached from several locations, including: 1. via the Swampy Lakes Trail #23, accessed from Swampy Lakes Trailhead, 16 miles west of Bend on Century Drive; 2. via the South Fork Trail #25 from Skyliner Trailhead, or Tumalo Falls Trailhead, 10-12 miles west of Bend out Skyliner Drive; 3. via Flagline Access Trail #40.1 or Swampy-Dutchman Trail #40, from Dutchman Trailhead, 21 miles west on Century Drive; or 4. via Big Meadow on Forest Rd. 370 above Todd Lake Trailhead, just north of Century Drive, 25 miles west of Bend.

Seasonal Access: Normally Open: Mid-August-Late Fall

Facility Type: Trail