The National Park Service authorizes 16 concessionaires to run rafting trips through the canyon—you can view a full list at the park’s website (www.nps.gov/grca/planyourvisit/river-concessioners.htm). Trips run from 3 to 16 days, depending on whether you opt for the upper canyon, lower canyon, or full canyon. You can also experience a one-day rafting trip, either running a few rapids in Grand Canyon West with the Hualapai tribe or floating through Glen Canyon near Page.
Arizona Raft Adventures. Arizona Raft Adventures organizes six- to 16-day paddle and/or motor trips through the upper, lower, or "full" canyon, for all skill levels. Trips depart April through October. 4050 East Huntington Dr., Flagstaff, Arizona, 86004. 928/526–8200; 800/786–7238; www.azraft.com. From $2,025.
Canyoneers. With a reputation for high quality and a roster of three- to 14-day trips, Canyoneers is popular with those who want to do some hiking as well. The five-day "Best of the Grand" trip includes a hike down to Phantom Ranch. The motorized and oar trips are available April through September. 7195 N. U.S. 89, Flagstaff, Arizona, 86004. 928/526–0924; 800/525–0924; www.canyoneers.com. From $1,080.
Grand Canyon Expeditions. You can count on Grand Canyon Expeditions to take you down the Colorado River safely and in style: evening meals might include filet mignon, pork chops, or shrimp. The eight-day motorized and 14-day Dory trips range from $2,590 to $3,804, and some trips focus on special interests like archaeology and photography. Arizona. 435/644–2691; 800/544–2691; www.gcex.com.
Wilderness River Adventures. One of the canyon's larger rafting outfitters, Wilderness River Adventures runs a wide variety of trips from three to 16 days, oar or motorized, from April to October. Their most popular trip is the seven-day motor trip. 2040 E. Frontage Rd., Page, Arizona, 86040. 928/645–3296; 800/992–8022; www.riveradventures.com.