First, you’ll need a fishing permit.
Non-resident permits are available at the following locations: Canyon Village Marketplace (tel. 928/638-2262) in Grand Canyon Village; at Marble Canyon Lodge (tel. 800/726-1789 or 928/355-2225), a quarter-mile west of the Navajo Bridge on Highway 89A; at Lees Ferry Anglers Fly Shop (tel. 800/962-9755 or 928/355-2261); and at Cliff Dwellers Lodge (tel. 800/433-2543 or 928/355-2228), 9 miles west of Navajo Bridge on Highway 89A. Fishing licenses are not available on the North Rim.
Give a call for current costs for one- and five-day permits. At time of this article, one-day nonresident permits are available for $17.25 and five days for $32. The National Park Service dictates artificial lure regulations and bag limits over various stretches of the Colorado River. Contact them for regulation updates.
If you’re going to bring a pole on the raft, it will have to collapse in half, at least.
The best trout fishing inside the park is at the canyon’s eastern end, upstream of Phantom Ranch. The river is clear and cold (48°F/9°C) year-round directly below the dam. Native trout species have evolved to live in muddy water and with extreme temperature variations. This is good news for you full and upper canyon river rafters seeking trout.
For lower river trippers, it seems that downstream the river gradually warms and gathers sediment from its tributaries. This causes the trout population to dwindle and enabling the bottom-feeders to survive. The five most abundant fish species in the park are carp, speckled dace, flannel-mouth sucker, rainbow trout, and blue-head sucker.
If you get to Marble Canyon a day early, you can rent a boat or walk upstream from Lee’s Ferry for some trout fishing. If you don’t have your rod and waders with you, you can rent them and a boat from Lees Ferry Anglers Guides and Fly Shop at Cliff Dwellers Lodge (where upper and full river guests will spend the first night) in Marble Canyon which also offers complete fishing guide service and carries a full line of fishing gear and tackle.
If you’re not into fishing, check out the other things to do if you arrive early at Marble Canyon.