Lake Elmer Thomas Recreation Area (LETRA) is Fort Sill's premier recreation destination. Located within close proximity to the Wichita Mountains Wildlife Refuge and Medicine Park, LETRA features a no-wake lake with year-round camping availability, cabins and summer recreational activities. Facilities include a boat ramp, picnic areas, beaches and swimming areas. Visitors will enjoy a wide range of activities including fishing, hiking, biking, mini-golf, bird watching, volleyball and even scuba diving. 

LETRA is available for camping year-round with several options including RV sites, tent camping, primitive camping and modern cabins. This recreation area also features a double flume waterslide and several playground structures located throughout the park, as well as paddleboat, kayak and canoe rentals.  

The LETRA Country Store offers many camping and recreational items for your stay. The store is stocked with a variety of items including drinks, snacks, fishing tackles, fishing licenses, hats, apparel and often forgotten personal items. Check-in and -out for camping and rentals are also in the store.