Planning early is of the essence if you want to travel by boat through the Grand Canyon. About 29,000 people made their way down the Colorado River last year. Trips lasted from one to 25 days, in rafts, kayaks, dories and large motorized craft known as J-Rigs. Around 75 to 80 percent of the trips are commercial; the rest are authorized by private permits that are obtained through a lottery run by the National Park Service and must be applied for a year in advance. It's wise to book commercial trips months ahead of time; launch dates fill quickly, and most companies do not run trips during fall, winter and early spring. Peak season is from May 1 through Aug. 31.

GETTING THERE: Most commercial launches will shuttle passengers to put-in and takeout sites. The most common put-in is Lees Ferry, about midway on Arizona's northern border, just south of Utah. Diamond Creek, east of Lake Mead National Recreation Area, is a favored takeout. Both sites are within easy driving distance of Flagstaff. Some trips out of Las Vegas, closer to the western end of the Grand Canyon, offer helicopter flights to and from the river. Western River Expeditions (866-904-1160, http://www.westernriver.com), for example, has a three-day lower canyon fly-in trip for $1,135 a person during high season.
OTHER OUTFITTERS: The park's Web site also lists commercial outfitters, including AzRA (800-786-7238, http://www.azraft.com), or Arizona Raft Adventures; it comes well recommended from people I know who have rafted with the company. It offers a variety of trips: paddle rafts, oar rafts, motor rafts and "hybrid" trips -- a mixture of those modes. The hybrids are great for parties with mixed abilities. Those who want to use their skills and daring can go on paddle rafts, while those who want to relax and have a relatively easy route through the rapids should consider a large motorized raft. A 16-day full canyon trip with a commercial outfitter, such as AzRA, can run a minimum of $3,500 a person. AzRA also offers shorter trips, such as a six-day upper-canyon trip at $1,800.

Grand Canyon Dories (800-346-6277, http://www.oars.com/grandcanyon/dories) is a good choice for people who would like their thrills in what the company calls "small, traditional and charmingly elegant" rigid boats. That elegance comes with a higher price than many commercial trips -- $4,753 to $5,193 for 15- to 18-day trips, or $2,615 to $2,770 for seven- to eight-day trips.

Source :- washingtonpost