Transformer Corridor
Transformer Corridor in Idaho offers 8 mixed climbing routes ranging from 5.8 to 5.12a.
Photo: Bold Frontiers, CC BY 2.0 (via Flickr)- 8 routes
- 5.9 – 5.11a
- Mixed · Sport · Trad
Is Transformer Corridor open right now?
No closures listed
The National Park Service lists no closures for City of Rocks National Reserve.
As of · Source: NPS · City of Rocks National Reserve. Agencies don't list every closure — check before you go.
Best time to visit Transformer Corridor
Best months: April–June and August–October. Best months have typical highs of 55–85 °F, lows of 30 °F or warmer (32 °F where the station doesn't record snow), at most one snowy day and no more than 12 wet days.
Jan
35° / 16°
8 wet
Feb
39° / 19°
7 wet
Mar
48° / 27°
6 wet
Apr
55° / 33°
7 wet
May
65° / 41°
9 wet
Jun
75° / 50°
6 wet
Jul
86° / 59°
5 wet
Aug
85° / 57°
6 wet
Sep
74° / 48°
5 wet
Oct
60° / 35°
5 wet
Nov
45° / 24°
6 wet
Dec
35° / 17°
8 wet
Typical high / low (°F) and days with rain or snow, 1991–2020. Measured at Rosette, UT, 23.6 mi away at 5,685 ft. The station sits about 500 ft lower than this place, so expect it a little cooler here. This station doesn't record snowfall. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Transformer Corridor is a climbing area in Idaho's City of Rocks National Reserve, managed by State Park and Recreation. It sits among a cluster of other climbing spots and trails, with Bumblie Rock, Cannibal Corridor and Flaming Rock all about 0.1 mile away and the Bumblie Wall Trail just as close. The routes here run from about 5.9 to 5.11a, with mixed and sport styles making up the bulk. Sport routes include Dynamo Hum at 5.10c and Mystery Bolter at 5.9, while Chomping at the Bit at 5.11a is the hardest of the listed climbs. For timing, the most comfortable stretch is June through September. Typical averages from a nearby weather station at Rosette, Utah, show highs around 75°F in June and 74°F in September, with July peaking near 86°F and winter highs around 35°F. Independence Lakes Campground, about 10 miles away, is the closest place to camp.
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