Montana

Cap Rock RV in Glendive MT has a dump station for $10. Useful for staying at Makoshika State Park.
413 E Relf St, Glendive, MT 59330
https://maps.app.goo.gl/UtPdz662jAZgKUfX9

Dump station next to highway, easy access. Rest stop bathroom area next to Sheridan County Museum and fairgrounds.

Ennis RV Park just north of town.
Dump Station now $20 was $10

Town Pump Conoco on north end of town by round-a-bout.
Free dump and potable water

Sinclair Station, 620 57th St, 406-727-5746. Dump is on the side of station, ask for key. Free.

Last updated: 10/20/2006

West Side Self Service on US-2. Cost is unknown.

Last updated: 6/30/2003

Town Pump, 3700 31st St SW, Great Falls MT 59404 / 406-452-0342. Rinse water. Propane. $10 or less. I-15 Exit 277.

Last updated: 6/24/2022

Cenex Zip Trip, 1321 S Haynes Ave, Miles City MT 59301 / 406-232-4549. Free. I-94 Exit 138.

Last updated: 5/6/2015

Town Pump, 505 NW Bypass, Great Falls MT 59404 / 406-268-1700. Rinse water. Propane. $10 or less.

Last updated: 6/24/2022

Bretz RV & Marine, 4800 Grant Creek Rd, Missoula MT 59808 / 406-541-4800. Free. I-90 Exit 101.

Last updated: 8/20/2019