Blue Marsh Lake

Blue Marsh Lake: access and conditions

Blue Marsh Lake sits at 40.3800, -76.0314. Impoundment dates back to 1979. Releases go downstream into the Tulpehocken Creek. The surface sits around 289 feet above sea level.

Station 01470870, Blue Marsh Lake near Bernville, PA, publishes the water surface elevation used here. The last value stored here, 290.39 ft, is from 2026-09-09. The top of the dam sits at 331.3 ft. Over the record shown on the level page the gauge has moved between 284.47 ft and 290.54 ft (low on 2025-11-07, high on 2026-09-03). The Corps of Engineers puts the top of the flood pool at 306.3 ft. The agency sets full pool at 284.3 ft. Beach width and ramp access both move with the pool, so the number above is worth a look first.

If Blue Marsh Lake is busy, the nearest alternatives here are Marsh Creek Lake (Pennsylvania, 27 mi), Lake Clarke (Pennsylvania, 37 mi) and Beltzville Lake (Pennsylvania, 38 mi). Pennsylvania has 35 lakes on this site in total.

A missing beach entry often just means nobody has catalogued the access point yet. There is no beach on record at Blue Marsh Lake in the datasets this guide reads.

Check the operating agency for advisories before any water contact, especially for blue-green algae in late summer. No public sensor reports water temperature at Blue Marsh Lake, so the panel shows air temperature and wind. Swimming season in Pennsylvania runs through the warm months, and day-use areas set their own opening dates.