Lathrop State Park provides boat ramp access to Horseshoe Lake Reservoir on the north side of the lake, plus an ADA-accessible kayak/canoe launch on the south side for paddlers.

A daily vehicle pass ($10) or individual pass ($4) is required for park entry, and mandatory aquatic nuisance species (ANS) boat inspections are conducted daily from 6 a. m. to 9 p. m. at the park entrance off Highway 160.