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© 2026 Roaming.Camp · Data from NPS, Recreation.gov, BLM, USFS, NWS, and the FCC.Operating on ceded ancestral land.Photography via Unsplash.

Leave it better than you found it.

Afterbay Campground looking toward Grapevine Campground.

Campground

Afterbay Campground

Montana

Weather Signal Booking Overview Reviews Trip reports Photos Nearby

Overview

- Near Fort Smith, Montana - Open All Year - 22 RV and tent sites are located on the south shore of Afterbay lake - All sites have fire rings and picnic tables - Composting vault toilets - All sites are back in (not pull through) - All sites have electric and water - RV dump station available across the road near the Headquarters building

At a glance

Type: Campground
State: Montana
Coordinates: 45.3154° N · 107.9415° W
Phone: (406) 666-2333
Booking: First-come, first-served

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Weather

7-day forecast

Thu77°51°Sunny
Fri73°33°Partly Sunny
Sat52°32°Mostly Sunny
Sun54°32°Sunny
Mon56°35°Mostly Sunny
Tue60°35°Slight Chance Rain And Snow Showers
Wed56°Slight Chance Rain And Snow Showers

Thu: Sunny · wind 3 to 7 mph SSE

National Weather Service · refreshed hourly

Signal

Cell coverage here

No carrier reports signal at this spot.

FCC coverage data · signal varies in remote terrain

Booking

Reservations

First-come, first-served

(406) 666-2333 Get directions

Recreation.gov and the managing agency

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Trip reports

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