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Grapevine Campground

Yellowtail, Montana · Big Horn County · Campground

- Near Fort Smith, Montana - Open All Year! - $18 per night fee (50% off with Senior Pass) - 14 RV and tent sites are located on the north shore of Afterbay lake - RV sites are back in (not pull through) - All sites are handicapped accessible, have fire rings, and picnic tables - Vault toilets are accessible - There ar…

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About Grapevine Campground

- Near Fort Smith, Montana - Open All Year! - $18 per night fee (50% off with Senior Pass) - 14 RV and tent sites are located on the north shore of Afterbay lake - RV sites are back in (not pull through) - All sites are handicapped accessible, have fire rings, and picnic tables - Vault toilets are accessible - There are no RV hookups - Trash cans available seasonally (May-Oct) - RV dump station and drinking water available across Afterbay lake near the Headquarters building and Afterbay Campground

How to Get There

Take 313 through the town of Fort Smith, MT. Follow the brown and white direction signs. Turn right on Rte 12 and drive across the afterbay dam. Continue on Rte 12 for approximately 1.6 miles. Turn left into Grapevine Campground.

Driving directions (Google Maps) →

What to Pack for Your Stay

Tuned to the live forecast for this park.

👔 What to Wear

  • 👕
    Long-sleeve shirt
    Synthetic or merino, sun-protective.
  • 🧥
    Light shell or windbreaker
    Even on warm days, wind can chill (avg wind 0 mph).
  • 👖
    Hiking pants or convertible
    Layer for variable conditions.
  • 🥾
    Trail runners or low boots
    Comfortable, broken in.

🎒 What to Pack

  • 💧
    Water
    Bring at least 1L of water; more in heat.
  • 🍫
    High-energy snacks
    A snack for the trail.
  • 🧴
    Sun protection
    Sunscreen, sunglasses, brimmed hat.
  • 🩹
    First-aid kit
    Blister patches, ibuprofen, tape, antiseptic wipes.
  • 🗺
    Offline map
    Download your route in advance via Gaia, Caltopo, or OSM-based apps.

Recommendations adapt to the current forecast + trail stats. Use them as a starting point — local conditions, your experience, and the time of day you start all matter.

Plan Your Visit to Grapevine Campground

Heading to Grapevine Campground? A few things to know before you go:

  • Reservations: popular sites fill up fast — check Recreation.gov 6 months in advance
  • Fees: day-use and camping fees vary; check current rates on the official park page
  • Trash & pack-out: follow Leave No Trace principles
  • Wildlife: store food in bear boxes where provided; never feed wildlife
  • Weather: the 5-day forecast above is updated every 6 hours; verify just before you go

Frequently Asked Questions

Do I need a reservation for Grapevine Campground?

No central reservation system listed for Grapevine Campground. Check the official page (https://www.recreation.gov/camping/campgrounds/10091755) for the latest entry policy and availability.

How do I get to Grapevine Campground?

Take 313 through the town of Fort Smith, MT. Follow the brown and white direction signs. Turn right on Rte 12 and drive across the afterbay dam. Continue on Rte 12 for approximately 1.6 miles. Turn left into Grapevine Campground.

How do I contact Grapevine Campground?

You can reach the park at phone: (406) 666-2333 or email: dyanna.threeirons@crow-nsn.gov.