Diamond K Outfitters (406-580-0928) offer the best of two worlds: guided fishing trips to high mountain streams and lakes by horseback. Jake's Horses (406-995-4630; http://www.jakeshorses.com) operates all year long, with day rides, hay ride dinners, and overnight pack trips and fishing trips in summer. Find them just off Highway 191. Lone Mountain Ranch (800-514-4644 or 406-995-4644; http://www.lmranch.com) makes riding available for overnight guests, offering wide-ranging rides with wranglers who know the country and wildlife. 320 Guest Ranch (800-243-0320 or 406-995-4283; http://www.320ranch.com) has backcountry rides and an indoor stable. It's located at mile marker 36 on Highway 191, south of the Big Sky turnoff.