State Park / State Forest · Montana campground guide
The numbers
Fee range
$24–$38/night
Season open
May through September
RV size limit
Up to 35 ft
Reservation window
9 months ahead via MT State Parks portal
The insider read
Montana's first state park (1937). 2-hour limestone cave tour daily May-Sept; book the morning of at the visitor center. Sites along the bluff face Tobacco Root Mountains.
Original analysis from PickRV — synthesised from public sources you can verify, pulling the operational details competitor guides typically skip.
Verify at fwp.mt.govOn site
Book it right
PickRV doesn't handle campground bookings — reserve direct through the official channel so policies and cancellations flow through one record.
Opens montanastateparks.reserveamerica.com
Every fact above is sourced from the managing agency's canonical page. Cross-check fee, season, and size limit before you depend on them.
Match the campground's size limit and hookup level to a vehicle category, then plan the rest of the trip.
Keep exploring
Near Glendive
StateInsider tip · Largest MT state park — badlands geology. Triceratops skull found here 1991 (visible at the visitor center). Stars + silence (no town glow).
Near Big Arm
StateInsider tip · Largest Flathead Lake state-park unit. Wild Horse Island day-trip from the marina — wild horses + bighorn sheep. Sites on the bluff have the dawn lake view.
Near Livingston
BLMInsider tip · Free BLM dispersed sites along the Yellowstone River — sunrise on the Absaroka Range. Pack out everything. Closest free camp to Yellowstone's north entrance.
Near Babb
NPSInsider tip · 'Switzerland of America' — Many Glacier valley with the most grizzly density in the park. Vehicle reservation required for Many Glacier Rd late May - early Sept. Iceberg Lake hike (10 mi) from camp.
Your next step
Lewis and Clark Caverns State Park Campground takes rigs up to 35 ft, so what you arrive in decides whether the loop works at all. If you don't own one, the same trip runs on a motorhome rented in Montana.
Nothing in Montana is bookable today — PickRV opens for bookings on October 25. Dated requests are what we take to owners, so give us the window you actually want — you get one email the day a rig covers it, and nothing else.
Nearby & related
Sourced costs, campground directories, and the places worth a detour — the next layer of Montana trip planning.
Before you go
Montana rules
Verified 2026-05-10
