Marias Pass (Essex)

Essex sits at the heart of BNSF's Marias Pass crossing, where the Hi-Line Subdivision tackles a sustained 1.8% grade on the western slope of the Continental Divide. The town itself is tiny — a handful of buildings, the BNSF helper facility, and the historic lodge (formerly the Izaak Walton Inn, now LOGE Glacier) that has served as a railfan base camp since 1939. U.S. Highway 2 parallels the tracks closely for the entire 17-mile climb from Essex (elevation ~3,850 feet) to the summit at 5,213 feet, providing dozens of accessible pulloffs and viewpoints without any need to trespass.

Eastbound trains pick up manned helper sets at Essex for the climb to the summit. Two helper consists, each typically a pair of units, are based here and cycle continuously between pushes. Watching helpers couple onto a heavy grain or oil train, then hearing the combined horsepower echo through the canyon as they begin the ascent, is the signature experience of this location. Westbound trains descend under dynamic braking, their distinctive whine audible well before they come into view. The radio frequency for the road channel is 161.250 MHz, and trackside detectors at MP 1208.6, 1212.9, and 1236.6 call out wheel counts after each train. Carry a scanner — it adds enormously to the experience.

Essex occupies a narrow valley along the Middle Fork of the Flathead River, hemmed in by the densely forested western slopes of the Lewis Range. Glacier National Park forms the northern boundary; the Great Bear Wilderness lies to the south. Lodgepole pine, Douglas fir, and western larch crowd the right-of-way, punctuated by dramatic openings where the tracks cross steel bridges over Java Creek and Sheep Creek. In summer, the valley is lush and green, with wildflowers lining Highway 2. By October, the western larch turns brilliant gold — one of the few deciduous conifers — creating striking contrast with the evergreens.

Winter transforms the pass into a snow-fighting battleground. The area averages around 250 inches of snow annually, and BNSF maintains a fleet of flangers and Jordan Spreaders at Essex to keep the line open. Ten historic snowsheds, built by the Great Northern between 1912 and 1930, still protect the double-track main along a four-mile stretch of "Avalanche Alley" east of Essex. Avalanche control is coordinated with the National Park Service, which must authorize explosive triggering along the park boundary. On clear winter days, frosted trees and locomotive exhaust plumes against snow-covered peaks create extraordinary photographic conditions. The area is remote — no cell service in Essex, and the nearest gas stations are at West Glacier (25 miles west) or East Glacier (30 miles east). This is grizzly bear country; carry bear spray at all times.

BNSF's Hi-Line Subdivision is the railroad's primary northern transcontinental route, linking Chicago and the Pacific Northwest. Through Essex, expect 25-30 trains in a typical 24-hour period according to Trains Magazine, though volume varies — Mondays tend to be lighter since not all trains run daily. The freight mix includes double-stack intermodal (including premium Z-trains), unit grain trains bound for Pacific Northwest export terminals, crude oil from the Bakken region of North Dakota, manifest freight, and occasional military or dimensional loads.

Eastbound loaded trains receive helper sets at Essex for the 17.4-mile, 1,400-foot climb to the 5,213-foot summit. Helper symbol K-ESXESX1 identifies the Essex-based sets, which typically consist of two SD70ACe or ES44 units. Trains with distributed power (DPU) generally do not require helpers. Westbound trains descend from the summit under strict speed control, dynamic brakes whining through the snowsheds.

Amtrak's Empire Builder (trains #7 westbound and #8 eastbound) passes through daily. Essex is a flag stop — the train only halts for passengers with reservations. Scheduled times are approximately 7:41 PM for the westbound and 8:55 AM for the eastbound, though delays are common on this single-track-with-sidings route. Power is typically Siemens Charger SC-44 locomotives or the older GE P42DCs.

The pedestrian footbridge near the former Izaak Walton Inn (now LOGE Glacier) provides an elevated vantage point for shooting trains in both directions, with the lodge and helper yard as backdrop. At track level, the lawn area just 20 feet from the main line is excellent for roster shots, night photography under the lodge's exterior lighting, and capturing helper coupling operations in the adjacent yard.

East of Essex, Highway 2 climbs alongside the tracks through "Avalanche Alley," where the historic wooden snowsheds offer dramatic framing opportunities. Goat Lick Overlook, about 2-3 miles east, is an elevated pulloff that frames trains against limestone cliffs and the Middle Fork Flathead River below — best in afternoon light when the sun illuminates the western-facing rock.

The Java Creek and Sheep Creek steel bridges, visible from Highway 2, are signature Marias Pass shots. A telephoto lens (200-400mm) compresses the mountainous backdrop nicely. For the classic summit shot, the Roosevelt Memorial area at the top of the pass offers open views of both tracks with peaks in the background — sunrise backlighting here accentuates exhaust plumes on cold mornings.

Light direction matters: the tracks run roughly east-west through Essex, so morning light favors shooting eastbound movements, while afternoon sun works better for westbounds. In winter, the low sun angle and reflective snow create luminous exposures, but bring a polarizing filter for glare control.

Marias Pass holds a singular place in American railroad history. At 5,213 feet, it is the lowest crossing of the Continental Divide between Canada and central New Mexico. The pass was long known to the Blackfeet, Salish, and Kootenai peoples as a travel route, but had gone unused for generations due to a Blackfeet superstition.

In December 1889, civil engineer John F. Stevens — hired by James J. Hill for the Great Northern Railway — set out from Fort Assinniboine to locate the pass. Accompanied by a Flathead guide named Coonsah, Stevens traversed the pass in extreme conditions: four feet of snow, temperatures near -40°F, and no fire for warmth. His discovery confirmed the route was feasible for railroad construction — the approach was broad and open, requiring no tunnels. Construction began August 1, 1890, and the line reached the summit on September 14, 1891. Regular service over the pass began in the early 1890s.

The Izaak Walton Inn was built in 1939 by the Addison Miller Company for the Great Northern Railway, providing lodging for the roughly 200 winter snow-fighting crew members stationed at Essex. The 29-room Tudor Revival structure was also intended as a potential southern gateway to Glacier National Park, though World War II ended those plans. Listed on the National Register of Historic Places in 1985, the inn was sold to LOGE Camps in 2022 and reopened as LOGE Glacier in 2024.

At the summit, a 60-foot granite obelisk erected in 1931 honors Theodore Roosevelt's conservation legacy, and a bronze statue commemorates Stevens — though it was temporarily removed in 2025 for bullet-damage repairs.

Marias Pass stands apart from other railfan destinations for several converging reasons. First, the manned helper operations at Essex are increasingly rare on modern Class I railroads — watching dedicated helper sets couple onto and shove heavy trains up a sustained mountain grade is an experience few locations still offer. Second, the setting is unmatched: BNSF's main line runs along the southern boundary of Glacier National Park, meaning trains move through one of America's most spectacular mountain landscapes.

The railroad's ongoing battle with winter adds another layer of drama. BNSF's avalanche forecasting program, developed over two decades in coordination with the National Park Service, is unique in North American railroading. The fleet of flangers, spreaders, and the restored former Santa Fe Hi-Level coaches that serve as "Snow Coaches" to transport crews when roads are impassable — all based at Essex — make winter visits especially rewarding for those prepared for the cold.

Public access is unusually good. Highway 2 runs alongside the tracks for the entire climb, there are no fences, and the pedestrian bridge at Essex puts you directly above the action. The only significant downsides are the remoteness — no cell service, limited food and fuel options — and the wildlife. This is the heart of the continental U.S.'s largest grizzly bear population, and encounters are not uncommon along the highway corridor.