Lathrop State Park provides multiple boat ramps for accessing its two lakes: Horseshoe Lake boat ramp (north side) and Martin Lake boat ramp (southwest side), plus an ADA-accessible canoe/kayak launch on the south side of Horseshoe Reservoir.

The park requires a daily vehicle pass ($10) or annual pass ($80) for entry, and all motorized watercraft must be inspected for aquatic nuisance species before launching.

Horseshoe Lake operates at wakeless speeds only, while Martin Lake allows water skiing and motorized boating in designated zones.