Three Sisters, River islands in Potomac River, Washington D.C., US
Three Sisters are three small rocky formations rising from the Potomac River west of Key Bridge in Washington D.C. The rocks form naturally from layered stone shaped over time by water erosion and river currents.
Captain John Smith documented these formations during his 1607 expedition up the Potomac River, establishing them as a notable landmark for colonial navigation. The rocks served as a recognizable reference point in the river's course.
The islands carry a Native American legend about three Algonquian sisters who transformed into stone after attempting to rescue their brothers. This story shapes how visitors relate to and remember the place today.
The best access is by kayak or paddleboard, with landing possible on sandbars during low water levels. Check water conditions before planning a boat trip, as accessibility varies significantly by season.
Near these islands the Potomac reaches unusually deep sections around 24 meters, which sets it apart from other river areas. These deeper channels formed from stronger currents that actively scour away sediment.
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