The Lower Rim Trail is located just North of the Second Playground. The entrance is located in the wash. Take a LEFT into the first wash crossing heading North on the main road. Right after you pass the Second Playground you will take a LEFT where the wash jogs back towards the main road. The trail head is 200 feet after the turn.
You can find this Trail Head at these coordinates 36° 48′ 05.52″ N 108° 11′ 05.40″ W
Check out The Lower Rim Trail in these videos Click Here