Little Si ended up being one of the more interesting hikes I've done in Washington. Partway up the trail, you'll pass a massive rock wall where you can often spot people rock climbing, which was fun to watch and made the hike feel a little different from your typical forest trail. Once you reach the top, you're rewarded with sweeping views in every direction. It isn't the tallest summit around, but the open rocky viewpoints and 360° scenery make it well worth the climb.