River Explorer

Rivers in Pennsylvania

Named rivers across Pennsylvania from public map data, with live USGS flow where a gauge sits.

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USGS-sourced rivers
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State rankings

Longest Trails in Pennsylvania Parks With the Most Trails in Pennsylvania

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

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Do I Need a Park Reservation?Pick a park and a day: whether it needs a timed entry ticket or vehicle reservation, at what hours, and how to book it, from the park's own page.

Route PlannerDrop stops on a map and watch distance and drive time add up. Export a GPX or share the link.

Gear ChecklistsPrintable, save-as-you-go packing lists. Tick items off and pull them up on your phone.

Outdoor ClubsBrowse local clubs with meeting info and how to join, or start your own for free.

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.