The Boundary Trail once formed the boundary between the Columbia and Rainier National Forests. Now it marks the southern boundary of the Randle District. This was an important trail in the early history of the Forest Service it was the principal route used by rangers on horseback patrols. The trail was well established by 1911. It is now a National Recreation Trail, offering a backpacking opportunity or shorter hikes from various access points.

The west end, open to hikers only, takes you through parts of the Mount St. Helens NVM. The section of trail from Norway Pass to Elk Pass begins at the Norway Pass Trailhead on Road 26. The trail winds in and out of blown down forests. A short spur takes you to the shore of Ghost Lake at mile 2.

The trail continues to the junction with Strawberry Mountain Trail No. 220 near Bear Meadow. The section of trail east of Bear Meadow is open to hikers, horses, motorcycles and bicycles. From Bear Meadow to Elk Pass (4.5 miles), the trail is on a timbered, broad ridge, with occasional views of St. Helens. The section from elk Pass to the jct. with No. 292 is 2.5 miles. Badger Lake is approximately 4.1 miles from Elk Pass, Kirk Rock is 4.4 mile, Shark Rock is 5.4 miles and Craggy Peak is 6 miles.

The Trail crosses Road 29 then continues on to Dark Meadows (2.5 miles from Road 29), to the junction with Trail No. 5, to Summit Prairie (5.5 miles) and on to Table Mtn (7.9 miles). The trail continues another 1.5 miles to Council Lake. Along its length, this trail offers views of St. Helens, Rainier, Adams and a few glimpses of Hood. This area was glaciated repeatedly during the Ice Age. The marks of the glaciers' passage can be seen in the knifelike ridges and cirque basins all along the trail.