From Steve Schweitzer's A Fly Fishing Guide To Rocky Mountain National Park, flyfishingrmnp.com:
9,000 ft to 9,200 ft
The stretch of the creek has a tad more gradient than the lower section. While you'll mostly find brook trout, in late summer you'll catch a brown or two. Greenback cutthroat also inhabit this stretch, especially if fish are ...
Getting there: As you enter the Park from the east side and being your trek up Trail Ridge Road, you'll notice a gem of a little stream following and crossing under the road. Plenty of roadside parking pull-outs will give you access to walk the wooded and brush-lined creek. Look for a wood-planked walkway on Trail Ridge Road leading you in the midst of a beaver pond area where there is handicapped fishing access.