Rock climbers use the first half of this trail to get to the rock faces on the east end of Little Si. Hikers use the full trail to sweep around the west end and climb the tall knob on the easier (though still a bit rocky) route. Like its big sibling, Mount Si, Little Si offers phenomenal views of the Upper Snoqualmie Valley after a nice hike through forests and over rocks. The trail is steep initially, then mellow, then steep again as it scrambles straight up the northern spine to the 1576-foot summit.
This area was logged extensively, but in the intervening decades the forest has regenerated nicely, and a diverse collection of evergreens and deciduous trees shade the trail.