Sweetwater Summit Regional Park is a water park in Bonita, California, offering fun aquatic experiences for the whole family. This page covers Sweetwater Summit Regional Park tickets, current prices, opening hours, and what visitors are saying. Searching for a waterpark near you in Bonita, California? Sweetwater Summit Regional Park is one of the closest local options for families and visitors looking to cool off during the warmer months. Visitors rate Sweetwater Summit Regional Park 4.2 out of 5 stars based on 5 reviews. Guests frequently highlight Beautiful scenery and views, Spacious campsites with privacy, Clean facilities and helpful staff as standout aspects of the experience. Modern campsites with full hook-ups, scenic trails with views of the reservoir, seasonal aquatic playground. For the best experience, plan your visit during Weekdays during non-holiday periods to avoid the busiest periods. Plan your visit during weekdays for a quieter experience, bring insect repellent, and check for any aquatic playground maintenance updates before your trip.