Cascade Marine Trail Human Powered Boat Campsite in Washington offers stunning views of the Cascade Mountains and the Puget Sound. There are nearby opportunities for kayaking, boating, fishing, and hiking. The campground offers basic amenities such as picnic tables, fire rings, and pit toilets. The campsites are first-come, first-served, and there are a total of six available. The best time to visit is during the summer months, with average temperatures ranging from 60-70 degrees Fahrenheit.