Freshwater · Colorado River
Trout - Rainbow
These notes are district-general defaults. Search your lake or stream first — special waters override these rules. Full booklet: 2026 Freshwater Guide. Catch reports: Fish data.
Species group
TROUT
Season
Colorado River District waters follow Colorado River / district-specific freshwater rules in the 2026 Freshwater Sport Fishing Guide (not the coastal district tables alone). Look up Colorado River, border waters, and named Imperial / Riverside / San Bernardino waters in the guide’s special and district sections. IMPORTANT: If your lake, river, or stream is named in the Alphabetical List of Waters with Special Fishing Regulations (2026 Freshwater Sport Fishing Guide), those special rules override this district default.
Season notes
Confirm current bag, season, and gear with the freshwater booklet and any Arizona reciprocal rules that apply on the river.
Daily bag limit
See the 2026 Freshwater Sport Fishing Guide Colorado River / district tables for trout and other species bags.
Minimum size
See the freshwater guide for this district.
Gear restrictions
See the freshwater guide for this district (methods, bait, and boundary rules).
Identification
Resident freshwater rainbow trout adults average between 1 and 5 lb in riverine environments, while lake dwelling and anadromous forms may reach 20 lb. Coloration varies widely between regions and subspecies. Adult freshwater forms are generally blueish green or olive green with heavy black spotting over the length of the body. Adult fish have a broad reddish stripe along the lateral line, from gills to the tail, which is most pronounced in breeding males. The caudal fin is squarish and only mildly forked. Lake dwelling and anadromous forms are usually more silvery in color with the reddish stripe almost completely gone. Juvenile rainbow trout display parr marks with dark vertical bars typical of most salmonid juveniles. In some redband and golden trout forms parr marks are typically retained into adulthood.