Boulder Cave Sno-Park is a first-come-first-serve campground in Washington. It offers 17 campsites with picnic tables, fire pits, and vault toilets. The area is surrounded by beautiful forest views and is located near the Wenatchee River for fishing and swimming. The nearby Boulder Cave Trail offers a short hike to a picturesque cave. The best time to visit is in the summer months when the average temperature is around 80°F during the day and 60°F at night.