Tongass National Forest · Alaska

Harlequin Lake

0.7 mi of trail, end to end · about 50 ft of climbing · 125 ft–207 ft · native material surface · trail No. 35655 · trail class 3 · typical grade 0-5% · tread 18-24 inches wide · hiking, bike · seasonal: hiking 05/15-09/15

154 ft 202 ft · 0.4 mi high 202 ft

Trailhead Dangerous River Trailhead 154 ft Drive there

Dangerous River Trailhead the Forest Service's write-up

season Year round to

This trailhead looks to the east at Harlequin Lake with beautiful blue icebergs, and the Dangerous river is directly north, it is a breaded glacial river and you will often see icebergs floating down it.

This trailhead on fs.usda.gov

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Other trails from the Dangerous River Trailhead

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About this trail's facts

The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the forest's own site before you go.