1. NEW MEXICO: RAINBOW TROUT
Summer heat may stifle action on other waters, but on New Mexico's San Juan River, rainbow trout are very much on the feed bag. "Thanks to the Navajo Dam, our flows are consistent and water temps are 43 to 46 degrees," says guide Chris Guikema. "Cold enough to wear waders." Try sight-fishing nymphs to feeding trout in the morning, then switch to terrestrials at midday. Although 15 to 18 inches is the norm, you may tangle with a 28-incher. The Southwest isn't your only option for August rainbows. North Dakota's Garrison Dam tailrace is a fishery near Pick City with trout over 20 pounds.