McHenry Recreation Area is park on the lower Stanislaus located at roughly 24100 East River Road, near the crossroad of McHenry Road.
This park, the lowermost (and most westernly located) park on the Stanislaus River, provides river access, multiple parking lots, as well as overnight camping. River flows at the park are general mild and ideal for splashing and cooling off in the summer months, but remember to always consult flows (left hand sidebar) before ever venturing out into the river.
The park has access to picnic tables and restroom facilities, and camping reservations can be made by calling 209-881-3517. While this area is a popular take out for people on float tubes, because of low flows at this area in the summer months, river rafting is not very popular in this area.
Do be warned that in the summer months, weekends are incredibly busy at this park!