North of Ketchum and Sun Valley, Hwy-75 climbs through rising tracts of forests and mountains to top out after twenty miles at the spectacular panorama of Galena Summit. Spreading out far below, the meadows of the Sawtooth Valley stretch northward. The simple road meanders beside the young Salmon River, whose headwaters rise in the forbidding icy peaks to the south, as the serrated ridge of the Sawtooth Mountains forms an impenetrable barrier along the western horizon. Backpackers are guaranteed solitude in these climes, dotted with some five hundred remote alpine lakes – pick up details of camping sites and hiking trails at the Sawtooth National Recreation Area headquarters, eight miles north of Ketchum at 5 North Fork Canyon Rd (daily 8.30am–5pm; t 208-727-5000, w www.fs.fed.us/r4/sawtooth). Fly-fishing for brown trout, steelhead and salmon is a popular pastime here as well.