Lathrop State Park Access provides entry to Colorado's first state park near Walsenburg, offering two boat ramps on Martin Lake Reservoir—one on the north side of Horseshoe Lake and one on the southwest side of Martin Lake—plus an ADA-accessible canoe/kayak launch on the south side of Horseshoe Reservoir.

The park requires a valid Colorado State Parks pass ($10 daily or $80 annual vehicle pass) and features a visitor center with supplies, 103 campsites, and 8 miles of trails for hiking and biking.

Access is located 3 miles west of Walsenburg on Highway 160, then 1 mile north on County Road 502.