Chopawamsic Creek is a shallow, tidal creek located on the Mainside portion of Marine Corps Base Quantico in Virginia. It is subject to significant tidal changes, with depth varying from only a few feet at high tide to potentially unnavigable levels at low tide, especially during periods of heavy west or northwest winds. The creek's bottom is extremely soft with silt buildup. There are two primary boat ramps for access. The western ramp is a shallow gravel launch off Russell Road, best suited for canoes, kayaks, and lightweight craft; its parking is limited and maneuvering a car and trailer is difficult. The eastern ramp, located behind the Officer Candidate School, is a steeper, deeper cement ramp that can accommodate larger boats, though it can be slippery when wet or icy. The current at this eastern ramp can be strong on a wind-aided rising or falling tide, complicating launch and recovery. Paddlers must consult the tide schedule before a trip, as timing is critical for navigation and access. The creek is known for having lotus blooms, which can be a notable sight during summer paddles. The surrounding area includes wooded shorelines, and the creek flows into the Potomac River. Access to the creek is on a military base, and all visitors must register for an account on the base's iSportsman online platform. While fishing regulations are noted, they do not specifically restrict paddling. The overall experience is defined by its tidal nature, requiring careful planning around water levels and currents.