Lower Flats Fishing Access Site offers parking at the Munoz area (a Navajo Lake State Park lot with a pay station but no drinking water) located 2. 9 miles up Highway 173 and east on Highway 511 from Float 'N Fish.

The site provides trail access to the river from both the south side (via Frustration Point and Baetis Bend) and north side (via BLM parking at Simon Canyon or Cottonwood Campground), with most of the Lower Flats area being wadeable except during runoff.

This section is popular for both wade fishing and float trips, featuring varied water conditions from slow, smooth pools suitable for dry fly fishing to deeper runs with strong currents.