Start with the honest part. We could not confirm that "McLaughlin Hill" is a real, named feature on Interstate 94 in Montana. It does not appear on the Montana Department of Transportation chain-law list, in USGS records, on Wikipedia's I-94 Montana article, or in the AARoads guide for the route. The often-quoted "summit about 4,210 feet" does not check out either. The only nearby 4,200-foot figure describes high ground in southern Rosebud County, which sits well south of the interstate, not on it. So if you came here looking for a named climb with a posted grade, there isn't one to report.
What is real, and worth a trucker's attention, is the I-94 corridor across eastern Montana itself. The interstate runs about 249.6 miles from Billings east to the North Dakota line past Wibaux, following the Yellowstone River valley and rolling open ranchland (Wikipedia, "Interstate 94 in Montana"). There is no mountain pass on this stretch. The terrain is river bottom and prairie, with a series of low hills near Billings, in Treasure County, and south of Howard Valley near Forsyth. No single one of those is named or graded in any source we read.
The danger here is weather, not grade. Open country means strong wind, and strong wind tips high-profile trailers. Add winter ice, blowing snow, and ground blizzards, and you get the kind of conditions that shut the road down without warning. None of that runs on a schedule, so the live road report does more for you than any elevation number. Check MDT 511 before you roll and plan around the storm, not around a hill that the maps don't name.
- I-94 in Montana runs about 249.6 miles from Billings east to the North Dakota line past Wibaux (Wikipedia, "Interstate 94 in Montana")
- No "McLaughlin Hill" appears in MDT, USGS, Wikipedia, or AARoads sources, and the road has no mountain pass; it follows the Yellowstone valley and open prairie
- Montana's chain-control window runs October 1 through April 30 (MDT Tire and Chain Laws; MCA 61-9-436)
- Towing units of 26,001 lbs GVW or more must carry approved chains or traction devices during that window; four-wheel-drive vehicles are exempt from the carry rule (MDT Tire and Chain Laws; MCA 61-9-436)
- Chain-law fine is $225 for a first offense and $225 to $500 after (MCA 61-9-436 / 61-9-520)
- MDT designates no chain-up or brake-check areas on I-94 in Montana; its named chain-up hills are on mountain routes like I-15, I-90, US-2, and US-12 (MDT Tire and Chain Laws)
- High wind is the corridor's signature hazard: a wind-related semi crash blocked I-94 westbound near Miles City around milepost 151 on January 16, 2026 (KULR-8; Country Herald)