Open Water Data

UPR-5 Big Slackwater Boat Ramp

Williamsport, Maryland, United States

Data Sources
  • Water Quality Status
    Passed tests Thu, Sep 12, 2024 at 8:12pm
  • Air Temperature
    23.3°C / 73.9°F (air) Tue, Apr 29, 2025 at 11:00pm
  • Wind
    10.8 - 22.7km/h SW 226° Tue, Apr 29, 2025 at 11:00pm
  • Clear
    Clear Tue, Apr 29, 2025 at 11:00pm
  • Precipitation
    0mm Tue, Apr 29, 2025 at 11:00pm
  • Air Visibility
    16km Tue, Apr 29, 2025 at 11:00pm
  • Humidity
    57% Tue, Apr 29, 2025 at 11:00pm

This site is located at the C&O Canal Big Slackwater access off of Dam No. 4 rd. This is the most popular boat ramp in the Upper Potomac River because of the access to the deep water section called Big Slackwater created by Dam No. 4.

The description above was copied from or heavily based on Swim Guide, with permission.

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