Skip to content
Paddling Hubs

River Explorer

Rivers in Maryland

Community-mapped river reaches across Maryland. Length and live USGS flow where a gauge sits on the water.

  • Free to browse
  • USGS-sourced rivers
  • Open in the app for live flow and tracking

State rankings

Longest River Runs in Maryland

River data from the USGS National Hydrography Dataset (public domain). Live flow, where shown, from USGS Water Data.

More free tools

Other tools in this kit

View all tools
Do I Need a License?Whether your state's boater education rule covers a kayak, canoe or paddleboard, and the months you must wear a life jacket.
Route PlannerDrop stops on a map and watch distance and drive time add up. Export a GPX or share the link.
Skill DrillsInteractive 3D drills, one decision at a time. Pick wrong and you watch it fail, then learn why.
Gear ChecklistsPrintable, save-as-you-go packing lists. Tick items off and pull them up on your phone.
Everything MapListings, trails, spots, clubs and public land on a single full-screen map. Switch layers on and off, then tap any point for the details.
Paddling ClubsBrowse local clubs with meeting info and how to join, or start your own for free.