Isabel Harte is a primitive campground in San Angelo State Park on O. C. Fisher Lake's south shore, offering 25 campsites with basic amenities and access to 40+ miles of multi-use trails.

The campground provides water access for paddling and fishing, with a nearby boat ramp and day-use facilities, though the restroom is temporarily closed for improvements.

A $4 daily entrance fee applies per person (age 13+), and the south shore gatehouse is open 8:30am-4:30pm daily.