- Lewiston is part of the large Whiskeytown-Shasta-Trinity National Recreation Area. Lewiston Lake is more like a large, cold, slow-moving river with a large population of trout. Rainbow trout range from 8 to 18 inches, 12- to 14-inch average. The German brown average over 20 inches. Effective flies either cast from a drift boat or trolled slowly. There is productive slow trolling. Shore fishing produces both varieties of trout.
Lewiston National Recreation Area is located west of Redding, in Northern California, about seven miles downstream from Trinity Dam. The nearest highway is U.S. 299. The access road is Trinity Dam Blvd.