The North Fork of the St. Vrain River is a beautiful mountain stream located in northern Colorado, known for its excellent fly fishing opportunities. The river is surrounded by picturesque mountain scenery and is home to abundant trout, including browns, rainbows, and cutthroats.

The river's upper section is characterized by pocket water, riffles, and runs, while the lower section features deeper pools and long, slow stretches. Dry fly fishing is popular on the North Fork, with hatches of mayflies, caddisflies, and stoneflies occurring throughout the season.

The North Fork of the St. Vrain River is a must-visit destination for fly anglers seeking a picturesque mountain stream with excellent trout fishing opportunities.