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.

As you near the hulk of rocky bluff known as Little Si, the trail levels off into a swampy area. Small streams link bogs filled with trillium and skunk cabbage. The trail is generally high and dry, though you will encounter an area of mud or three.

At around 1.5 miles, views open up onto the high, craggy rock of the southeastern face of Little Si. You might see rock climbers crawling up the rock routes here. Continue along the trail as it loops north and then west to the gentler north face of Little Si.

The trail turns and runs straight up this northern spine, climbing steeply up the rocky ridge--you'll be forced to use your hands at times as you scramble up the biggest rocks--until finally capping out on the 1576-foot summit on the southern edge of the rocky prominence. Enjoy stellar views of the North Bend valley before heading back the way you came.