From the junction with the Palm Canyon Road just inside the Kofa NWR boundary, take the Kofa Queen Canyon Road approximately 5 miles across the desert to the canyon mouth, high clearance will make it easier. Continue up the canyon nearly 3 miles to the mouth of Ten Ewe Canyon on the R, high clearance necessary along with rugged tires and saw to prune branches, much of road is multiple strands up wash with tire-eating rocks. Hike any route up nearly level part of Ten Ewe Canyon, one choice starts between two metal posts. Pick up cairned route on ridge straight ahead which aims directly for Ten Ewe Mountain.
Route descends slightly to circle to rightmost canyon which it climbs to L of waterfall.
Cairned route may be hard to pick up, is sometimes on dry stream bed in center of canyon and sometimes on the side. It leads to summit with survey marker and register in cairn. Climb the pinnacle just to L of path on return if you think it might be higher. There are many other routes but if you can follow the cairns you know you won't get cliffed out. On return down Kofa Queen Canyon, note that road leaves main wash L between two cairns shortly before the canyon mouth.