Find a map of rivers for fishing by looking at state government websites such as Ohio ODNR Division of Wildlife and Texas Parks & Wildlife. Independent websites have fishing maps available at Utah Fishing Info and Colorado Vacation Directory.
The Ohio DNR Division of Wildlife provides individual downloadable maps of rivers where fishing is available including maps for the Ashtabula River, Chagrin River, Grand River and Rocky River. The website also provides additional information on boating laws and guidelines as well as water quality advisories and information on Ohio water trails.
The Texas Parks & Wildlife river fishing website provides maps of rivers for fishing as well as other fishing links including a map of public fishing areas on the Trinity River and public paddling trails. The website also provides a list of leased fishing access areas and state parks with river fishing access such as Paluxy River at Dinosaur Valley, Sabinal River at Lost Maples State Natural Area and Pedernales Falls.
A good non-government website providing detailed information and maps of fishing areas is the Colorado Vacation Directory which contains links for premium fishing, fishing by business name, a fishing lakes and rivers map, and fishing by towns and areas.