This map is not intended to be used to determine property ownership nor public fishing access. Consult official maps and appropriate resources for detailed access information.
From Steve Schweitzer's A Fly Fishing Guide To Rocky Mountain National Park, flyfishingrmnp.com:
From the Poudre Lake parking area, the stream is rather small and dominated by small brook trout. As the stream meanders through the valley, it gains water and momentum. It braids and weaves through perennial wet grassy land, so be prepared ...
US-34 to Poudre Lake. The most common access to this fun meadow stream fishery is in the small parking lot just north of Poudre Lake. From there, follow the footpath and river downstream for as long as you want to fish - literally - you could fisher your way out of the Park to the north if you wanted to travel over ten miles. The river has two looks, a small meandering stream and small boulder-clad version of the Cache La Poudres RIver that carves the canyon along Route 14 to Fort Collins. Note the trail is also named Poudre River Trail on some topographical maps and trail guides.