GPS Topo Maps
Above the Timber publishes 24,000:1 scale topographical maps in Garmin compatible format for six western states. The map emphasis is on detailed public lands using light colors with high contrast line features such that field map viewing is optimized, especially with Garmin's line of touchscreen GPS receivers.
The maps work on all Garmin mapping GPS receivers: Montana, Oregon, Dakota, Colorado, GPSMAP 60, 76, 62, 78; eTrex, Rino, Nuvi. See "Map-GPS Compatibility" for a discussion and examples.