Diann & I picked up this hike also based on a recommendation from the same book as we used in the last several weeks' hikes ( Winter Hikes in Puget Sound & the Olympic Foothills: Mostly Snow-Free Trails from Lowland Forests to Summit Views , ISBN 1570611491). The hike was approximately 4 miles round trip on a relatively easy hiking trail. The trail follows the Boulder River up and has two amazing views of waterfalls feeding the river. It took us approximately 1.5 hours to get to the trailhead from Seattle and about 2 hours of hiking to do the round-trip. On arrival at the trailhead, we were surprised to see a pair of (what appeared to be) Bald Eagles flying overhead.