The Upper Delaware River System is a diverse fishery that changes seasonally and often times even daily. What is commonly referred to as the Upper Delaware is really three rivers; the West Branch, East Branch and Main Stem.
The Upper Delaware is a tailwater system with bottom release dams feeding the East & West Branches. The West Branch is the shorter river, some 15 miles from the dam to its junction with the East Branch, and as such provides the greatest influence of cold water to the Main Stem. It also can remain cold enough throughout the season to support an excellent wild trout fishery.
The East Branch is longer, about twice the length of the West Branch and provides little or no cold water to the Main Stem. The very upper few miles stay cold all season and provide an excellent spring creek type fishery for wild and hatchery trout. In the Spring & Fall the entire river is cold enough and hosts a fair number of transient spawning fish.
Conditions and fishing activity can be followed here where daily updates are usually provided: Fly Fishing The Upper Delaware River
Real-time water flow information for pertinent USGS river gauges, including water temperature where available are found here: Water Flow Data
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