Hiked up the road from here (elev 7888 feet). On the way up, bypassed the FAA station and went up the fire-burned chute, starting just below the final big switchback in the road. Went past the FAA station on the way down.
Pennell's summit had a funky USGS benchmark that stood on a pole about a foot above the rocky ground.
Summertime isn't the best time to do some of these desert peaks (90 degrees) but by going slowly and drinking lots of water, we hiked the 9 mile round tripper and came out fine. This is a neat peak and the views are expansive. We went up a road for a good portion of the hike with the last part following a rough path up to the summit. I was with my son in law on this one.