Notable cave · Adams, Pennsylvania

Portal B

Portal B is a cave in Adams, Pennsylvania.

Portal B: crowds and conditions

Typical pattern: moderate; weekends busier. Been there recently? Post today’s status and it shows here for the next traveller.

Status options for this cave: Open, good conditions · Very crowded · Approach road bad · Closed / not accessible.

Best time to visit Portal B

Season: Year-round; October to March is most comfortable, some caves flood in heavy rain.

Busiest days: Weekends and long holidays.

Crowd: Moderate; weekends busier.

Typical week: Mon light · Tue light · Wed light · Thu light · Fri light · Sat busy · Sun busy.

How to reach Portal B — distance from nearby cities

    Coordinates: 39.73782, -77.42563. Road distances are estimates; the road-trip planner uses real routes and adds stops worth the detour.

    Places to visit near Portal B

    See everything within a day’s drive of Portal B

    Other caves near Portal B

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    Map data © OpenStreetMap contributors (ODbL)

    Frequently asked

    What is the best time to visit Portal B?

    Year-round; October to March is most comfortable, some caves flood in heavy rain. Moderate; weekends busier.

    What are the places to visit near Portal B?

    Nearby: Pen Mar Park (park, 9 km), Strawberry Hill Nature Preserve (sanctuary, 11 km), Quirauk Mountain (viewpoint, 11 km), High Rock (viewpoint, 12 km), Catoctin Mountain Park (sanctuary, 12 km), Catoctin Mountain (viewpoint, 13 km).

    Is Portal B worth visiting?

    Portal B is listed as a notable cave in Pennsylvania on Spotwander.