Elevation: 8,911 ft
This peak is not in the book. Published December 2020
Lower Black Benchmark is the south summit of Black Mountain. I suspect that many of the folks driving along US-89 to the east probably regard this antenna-clad summit as the high point on Black Mountain, but it is not. The true summit lies about 0.8 miles farther north and is only 69 feet higher (only 35 feet higher according to my altimeter). Lower Black Benchmark is most easily reached via FSR-004 which comes up the south ridge from Deep Creek Road/FSR-070. USGS Tincup Mountain
From the junction of US-89 and Greys River Road in Alpine, WY (Alpine Market and Family Dollar are nearby), drive south on US-89 for 9.1 miles to [signed] Creamery Road/CR-111. Turn right/west onto CR-111 and drive 3.5 miles to an unsigned junction. Turn right/north onto Deep Creek Road/FSR-070 and drive 4.5 miles to the end of the road. Park here (7,280 feet). Please note that the USGS topo map does not show FSR-070 going this far up Deep Creek but it does.
Southwest Face/South Ridge, Class 2
From the end of FSR-070, there is a signed foot trail that continues north-northwest, following the east side of Deep Creek on an old 2-track jeep road. Neither the Caribou-Targhee National Forest Map nor the USGS topo map show this trail/old road, but it is useful for hiking. Hike up the foot trail for about 0.4 miles to reach a prominent dry gully on the right/east side of the trail/road. Leave the trail here and climb the shoulder on the left/north side of the gully. The gully soon bends north.
Cross the gully and bushwhack northeast then east to reach the summit ridge of Black Mountain. The terrain is not a simple face climb. It is a mix of minor dry gullies and minor shoulders. Try to stay mostly in steep, open grass/brush/sage slopes to intersect FSR-004 up near the ridge crest. Follow FSR-004 briefly northwest then leave it to bushwhack right/east up onto the nearby ridge crest through some thick brush and sagebrush.
The ridge crest of Black Mountain has an old 2-track jeep road on it (not shown on any maps). Hike north-northwest up the old road to quickly reach the summit of Lower Black Benchmark. The summit has multiple antenna installations and lots of concrete platforms, as well as FSR-004 leading up to the installations from the west side of the ridge. FSR-004 ends here. I could not locate the USGS benchmark.
North Ridge, Class 2
From the antenna-clad summit, descend north on a weak use trail that drops down to a minor saddle about 85 vertical feet below Lower Black Benchmark. This is the connecting saddle between the Lower Black Benchmark and the middle summit/true summit of Black Mountain. This concludes the first leg of today’s 2-peak journey. The true summit of Black Mountain is up next.
South Ridge/Southwest Face, Class 2
My descent route varied a bit from my ascent route. From the summit of Lower Black Benchmark, follow the 2-track jeep road south along the ridge crest for about ½ mile down to a flatter ridge section just prior to reaching a prominent gully on the right/west side of the ridge. Leave the road/ridge here and descend southwest down open terrain on the southwest face.
Enter the forest and bushwhack down to a prominent dry gully that drops steeply left-ish/south. Descend the gully (some loose, steep dirt/scree sections) south then southwest. As you near Deep Creek Road, contour right/west to return to the top of Deep Creek Road and your parked vehicle. This bushwhack route was a bit easier than my ascent route. The descent gully shows up on the USGS topo map.