Seventeen Idaho state parks list a dump station on their own park pages. We opened every Idaho state park page on 2026-11-01. Three say their dump stations are closed right now, and most of the rest have turned water off for the season, so bring your own rinse water. Only Bruneau Dunes and Three Island Crossing post a dump fee ($10). Every vehicle also pays the $7 Motor Vehicle Entrance Fee, or $14 for non-residents at Bear Lake, Farragut, Hells Gate, Priest Lake and Round Lake, per IDPR's fee table. Call the park before a long drive; numbers are in each row.
| Park | Status from the park page | Source |
|---|---|---|
| Bear Lake State Park 25 East 300 North, St. Charles, ID 83272 (208) 945-2325 | Dump station listed in the Mountain Fawn Campground amenities. Potable water is turned off for the season at Mountain Fawn; sites are available year round, reservations required. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Bruneau Dunes State Park 27608 Sand Dunes Rd, Mountain Home, ID 83647 (208) 366-7919 | Winterization began Oct 18, 2026: campgrounds, day use and RV dump stations have no water. Frost-free hydrants in the Equestrian campground have potable water until mid-March 2027. Dump fee: $10 (posted) | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Castle Rocks State Park 3035 S Elba-Almo Road (Hwy 77 Spur), Almo, ID 83312 (208) 824-5901 | Water at the Smoky Mountain Campground and dump station turns off Nov 2, 2026. Power outage in Almo on Nov 20, 2026 (8-9am and 4-5pm) affects campground electric hookups. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Dworshak State Park 9934 Freeman Creek, Lenore, ID 83541 (208) 476-5994 | Dump station listed in park amenities. The park's update banner is still dated 2025 ("Seasonal water is on"), so call before counting on water. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Farragut State Park 13550 E. Hwy 54, Athol, ID 83801 (208) 262-4444 (new number per park page) | Page says an RV sanitation dump station is available in the park. Fall 2026: Waldron campground open with vault toilets; water off at the sites. State Highway 54 construction means detours and alternate entrances. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Hells Gate State Park 5100 Hells Gate Rd, Lewiston, ID 83501 (208) 799-5015 | Dump station listed in park amenities. No seasonal dump notice posted. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Heyburn State Park 57 Chatcolet Rd, Plummer, ID 83851 (208) 686-1308 | Dump station listed in park amenities. No fall or winter dump notice posted (the banner is about the spring 2026 opening). Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Lake Cascade State Park 100 Kelly's Parkway, Cascade, ID 83611 (208) 382-6544 | Page: all water and dump station availability is subject to weather. Fall 2026: all water shut off for the season and hosts have left. In winter, camping moves to the Blue Heron, Van Wyck and Poison Creek boat ramp lots. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Lake Walcott State Park 959 E Minidoka Dam, Rupert, ID 83350 (208) 436-1258 | Water is off at the RV sites; fill-up water at the vacant host site and by the cabins. Campground open for reservations through Nov 1. A water-system project will close the campground; dates not yet announced. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Massacre Rocks State Park 3592 N. Park Ln, American Falls, ID 83211 (208) 548-2672 | Dump station listed in park amenities. No seasonal dump notice posted. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Ponderosa State Park 1920 N Davis Ave, McCall, ID 83638 (208) 634-2164 | Dump station listed in park amenities. Current notices are about forest restoration work and brief road closures, not the dump. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Round Lake State Park 1880 Dufort Road, Sagle, ID 83860 (208) 263-3489 | Dump station listed in park amenities. No seasonal dump notice posted. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Three Island Crossing State Park 1083 S. Three Island Park Dr., Glenns Ferry, ID 83623 (208) 366-2394 | From Nov 1, water is off in the Wagon Wheel Campground (reservable all year). Trailside Campground closed until Mar 1, 2027. Dump fee: $10 (posted) | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
| Winchester Lake State Park 1786 Forest Rd, Winchester, ID 83555 (208) 924-7563 | Page: "The RV dump station is still open; Water is turned off." Appaloosa Loop basic sites and yurts open year round. Cyanobacteria health advisory on the lake since Oct 7, 2026. Dump fee: Not posted | Idaho Department of Parks and Recreation Park page verified 2026-11-01 |
A park page listing a dump station in its amenities doesn't promise it's usable in a hard freeze. Where a page posts no winter notice, we say so instead of guessing. More cold-weather options are in winter RV dumping, and Idaho travel centers with a dump (Love's Bliss, Heyburn, Idaho Falls and Post Falls) are in truck stop dump stations.
Source: the Idaho state parks list and each park page linked above, all checked 2026-11-01. Parks whose pages don't mention a dump station (for example Eagle Island, Harriman, Lucky Peak, McCroskey, Thousand Springs) are left out.