The park is located along the Stanislaus River near the town of Ripon, California. The park protects a fine example of the threatened and still declining riparian oak woodland, which once flourished throughout California's Central Valley. Caswell is home to several endangered animal species, including the riparian brush rabbit which is not known to occur anywhere else. 

The Native Americans who lived along this river and collected acorns among these ancient groves were Yokuts. In the early 1800s, Spanish explorers traversed this area, and fur trappers found the river bountiful.

RECREATIONAL ACTIVITIES

Trails — One of the most magnificent aspects of the park is an abundance of extensive nature trails. The short trails offer a glimpse of what the riparian ecosystem of the valley looks like in its natural state.

Camping — In a pleasant, wooded area beside the river, 64 family campsites each have a table, camp stove, and food locker. The sites will accommodate trailers up to 21 feet long or motor homes up to 24 feet. Hookups are not available. The group campground will accommodate tent camping for up to 50 people, though it has been known to flood during the spring.

BOATING

OVERNIGHT FACILITIES
Family Campsites
Group Campsites
Hike or Bike Campsites
RV Access

TRAIL USE
Bike Trails
Hiking Trails

DAY-USE ACTIVITIES & FACILITIES
Picnic Areas
Exhibits and Programs
Fishing
Interpretive Exhibits
Beach Area
Swimming
Nature & Wildlife Viewing
Family Programs
Geocaching