Massacre Rocks State Park near American Falls combines Snake River scenery, Oregon Trail history, hiking, camping, boating, fishing, wildlife viewing, and interpretive displays in a rugged volcanic landscape. Amenities & Features ðĪïļ Oregon Trail history ðĨū Hiking trails ðĪ Snake River boating access ðĢ Fishing ðïļ Camping and Junior Ranger activities Good to Know The park is open year-round, but Read more…