Tilly Jane Tr643

3D view of Tilly Jane Trail #643

Overall: 5

Aerobic: 8

Technical: 6

Steepness: 8

Flow: 5

Singletrack: 100%

Tilly Jane Tr643 is a steep trail which ascends the eastern flank of Mount Hood, too short to be a destination ride but offering plenty of challenge for those seeking a tough climb.




Avg: 5mi



Elevation Change

Avg Ascent:1850'

Ascent Incline



Avg: 2hr





Using the 5.8mi (5% ascent) FR3512 to replace the 2.1mi (15% ascent) Tilly Jane Tr643 does reduce the grade to something more manageable, but the downhill is not worth such a long fireroad ascent, leaving this ride best suited for those able to manage a 15% ascent.

Depending on trail conditions, it may be possible to create a return loop with Polallie Ridge Tr643A (sometimes called Beargrass Path).

Be sure to check with the Parkdale Ranger Station on current conditions prior to riding either of these trails in the Spring or early Summer.

Nearby Dog Rvr Tr675 offers a more reasonable ride profile, with a long enough downhill to make the ascent worth the effort.

The Gunsight-Gumjuwac loop ride offers an even steeper downhill than Polallie Ridge Tr643A.


Mount Hood Wilderness Hiking

Timberline Trail 600, Pacific Crest Trail 2000-G and surrounding trails form a hub and spoke trail system around Mount Hood in classic Pacific Northwest trails circumnavigating Mount Hood with alpine vistas, waterfalls, alpine meadows and west side Cascade forest.

This section of the Pacific Crest Trail extends from Barlow Pass to Lolo Pass, with Timberline Trail 600 surrounding the north and east sides of Mount Hood at the treeline, from Yocum Ridge to Timberline Lodge.

Timberline Trail 600 was constructed by the Civilian Conservation Corps in the 1930’s, with challenging glacial-fed drainages crossing Newton, Coe, Muddy Fork, Sandy and White Rivers.

Wilderness permits are required and locator beacons are suggested. Mount Hood Summit info.

The large Area Maps on the following pages cover most of this trail system Pioneer Bridle Trail 795 East Fork Trail 650, Sahalie Falls Trail 667C, Timberline Glade Trail 661.

Timberline Tr600 TopSpur east to Cloud Cap crosses Lad, Coe and Eliot streams, with late season snow due to northern exposure and well established campsites at Mcneil Point, Carin basin (stone shelter) and Elk Cove.

Elk Cove Tr631 offers open views of the northern Mount Hood. The upper section wanders gently along the broadening ridge, crossing a shallow stream, then following a drainage switchback to the Timberline Tr600 intersection.

Pinnacle Ridge Tr630 follows Pinnacle Ridge to the scenic timberline area of Wy’east Basin and the Barrett Spur. After several stream crossings on the way to the treeline, cross a wet meadow area, after which the trail becomes faint, then is reestablished in the woods. Cross alpine meadows on the upper section of the trail, with close views of Mount Hood snowfields and spurs.

Vista Ridge Tr626 combines with Eden Park Loop Tr600H and Timberline Tr600, and offers relatively quick access to Elk Cove, Barrett Spur, Eden Park, Cairn Basin and Wy'east Basin.

Directions: SR35S to FR3510, then 2.4mi to FR3512. Go left on FR3512, to the Sno-Park TH. Trailhead parking is on the right in the Tilly Jane Sno-Park, across from the driveway to the ski area. View Larger Map. No Map?.

Tilly Jane Trail 643 Topo Map

Loop Directions

cooper spur backcountry

Tilly Jane Area Topo Map

  • TH: Ascend Tilly Jane Tr643 from the Sno-Park THView of Cooper Spur Ski Area TH
    View of Cooper Spur Ski Area TH
  • .6mi: Cross Doe Creek, followed by a steep .6mi ascent which may require some hike-a-bike.
  • 1.9mi: Pass the upper Polallie Falls Tr29 intersection, then cross a tributary of Tilly Jane Creek.
  • 2.3mi: Go left onto Polallie Ridge Tr643A, with an option to continue on Tilly Jane Tr643 to the Tilly Jane CG shelter, prior to descending Polallie Ridge Tr643A. From the campground, Tilly Jane Tr600A continues on to Timberline Tr600 wilderness area.
  • 2.7mi: Pass the lower Polallie Falls Tr29 intersection. Continue descending the ridgeline to the ski area.
  • 4.1mi: At the ski area, either go left to Tilly Jane Tr643 or ride the doubletrack switchback to the parking area.



Trail Index

This Ride

Polallie Ridge Trail 643A, Tilly Jane Trail 643

Mount Hood Wilderness Hiking

Bluegrass Ridge Trail 647, Elk Meadows Trail 645, Lake Branch Trail 32, Laurance Lake Loop Trail 12, Mazama Trail 625, N Section Line Trail 451, Pinnacle Ridge Trail 630, Polallie Falls Trail 29, Robinhood Trail 11, Sadle Trail 16, Tamanawas Falls Trail 650B, Tamanawas Tie Trail 650B, Timberline Trail 600, Vista Ridge Trail 626


Cloud Gap Saddle Campground, Sherwood Campground, Tilly Jane Campground


Trail Rankings

Ranking consistently applied to all of the listed trails.

  • Overall Rating: Ride quality and challenge
  • Aerobic: Ascent challenge
  • Technical Difficulty: Terrain challenge
  • Steepness: Average incline
  • Flow: Uninterrupted riding
  • Elevation Change: Total elevation gain
  • Ride Difficulty: Terrain challenge






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