Zone 58 covers the country east of Soda Springs along the Wyoming border, the Salt River Range foothills and the Caribou Mountains' southern flank. Elevations span from about 5,500 feet in the valleys to over 10,000 feet on the higher peaks. The lower country is sage and aspen-mahogany; mid-slopes carry doug fir, aspen, and lodgepole; the upper benches have subalpine fir and Engelmann spruce with meadow complexes. The Greys River drainage runs through the eastern portion (mostly in Wyoming) but the Idaho slope of the range is in this unit. Caribou-Targhee National Forest covers most of the public ground, with significant private ranchland in the valleys. Highway 30 and various forest roads provide access. Afton is across the Wyoming line for fuel; Soda Springs and Montpelier are the Idaho supply towns. Cell service is in towns and weakens in the timber. Elk and mule deer both inhabit. Elk numbers are strong because of the broader Greys River-Caribou herd that moves seasonally across the state line. The country is moderate-to-steep with good road access on the main drainages. October weather brings real cold; winter arrives early at elevation, and the higher trailheads can be cut off by November.