Eagle River in Colorado is a challenging destination for anglers seeking a thrilling fly fishing experience. The preferred season for fishing is from May to October, with the ideal flow rate ranging from 200 to 500 CFS. However, river access can be an issue due to private property and limited public access points. To ensure river stewardship, sustainability, and conservation, it is essential to practice Leave No Trace principles. Running Rivers is a nonprofit organization that provides valuable information on river conservation. 

Here are a couple of suggested fly shops and guides: 

Troutleader.com provides accurate river flow data, including mean, temperature, and CFS rates, making it a reliable source of information for novice and experienced anglers alike.