Lake Elmer Thomas is a 360-acre no-wake lake situated at the base of Mount Scott in southwestern Oklahoma, bordered by Fort Sill Military Base and the Wichita Mountains Wildlife Refuge. The lake features numerous inlets that provide intimate paddling opportunities away from the limited motorized traffic.

Access is available through the Lake Elmer Thomas Recreation Area (LETRA) on the southeastern shore, which offers boat ramps and a marina. Important note: Since the lake is partially on military property, visitors must obtain a pass from the Fort Sill Visitor Welcome Center before entering through Apache Gate. Between Memorial Day and Labor Day, there is a $7 per car entrance fee.

Kayaks, canoes, and stand-up paddleboards are available to rent at LETRA during the summer season (Memorial Day through Labor Day) for $8 per hour or $25 per day. All watercraft users must wear personal flotation devices while on the water.

The lake's clear waters and protected coves provide excellent wildlife viewing opportunities. Paddlers regularly encounter painted turtles, great blue herons, great egrets, and Canadian geese. The shoreline route takes approximately 4 hours to complete, with numerous scenic inlets to explore. Mount Scott provides a dramatic backdrop for photography, particularly when returning to the launch site.

Facilities at LETRA include restrooms, showers, a beach area, and a country store offering snacks and supplies. The surrounding area features free-roaming bison, elk, and longhorn cattle visible from the water. While the lake is generally peaceful, paddlers should be aware that artillery training occurs sporadically at the nearby Fort Sill range and can create unexpected loud noises.

The lake is particularly popular for fishing, with largemouth bass (including Florida strain) being a primary target. Several artificial fish structures have been installed to enhance the fishing experience. Two fishing piers and a floating boat dock are available on the refuge portion of the lake.