Why Semi Trucks Take the Long Way Around Wolf Creek Pass

Between South Fork and Pagosa Springs, Colorado, U.S. Highway 160 crosses the Continental Divide at Wolf Creek Pass. The whole run is about forty miles and takes roughly fifty minutes. There are drivers hauling eighty thousand pounds who instead go one hundred seventy miles south through Chama, New Mexico, to reach the same town on the same afternoon. Not because the pass is a bad road. Because it's a very good one. A hundred years of widening, realignment, blasting and paving turned Wolf Creek into four lanes of clean pavement with long straightaways and generous shoulders — and produced eight miles of seven percent grade that doesn't look like eight miles of seven percent grade. Colorado's own transportation department calls the width and the straightaways a deceiving sense of safety. It also built two runaway truck ramps into those eight miles. This is the story of how the pass got built, the engineer who chose the route on horseback in 1914, the three truck drivers who got a concrete snowshed poured for them and whose names aren't in the record, the ad man from Iowa who made the pass famous, and what the gravel at mile point 161 is actually admitting. Sources Colorado Department of Transportation — "Traveling US 160 Wolf Creek Pass: Beware the Wolf" (grade, ramp locations at MP 161 and 162.5, brake check and chain-up areas) codot.gov/travel/commercialvehicles/wolfcreekpass Colorado Department of Transportation — "CDOT warns truckers: Beware of US 160 Wolf Creek Pass," August 10, 2023 (Capt. John Trentini, 54 crashes 2015–2021; Kenneth Quintana on deceiving road features) South Fork Tines — "Safety stops scheduled on US 160 Wolf Creek Pass to educate big rig drivers" (Capt. Adrian Driscoll, 47 crashes 2015–2019) The Del Norte Prospector — "Wolf Creek Pass turned 103 this year" (Lisa Schwantes on the road being built wider than usual; Maloney and Riley; 1930 widening) The Pagosa Springs Sun — "Choosing the route for Wolf Creek Pass," John M. Motter (J.E. Maloney's own account of the 1914 survey; the Chapson family) Coloradotopia — Wolf Creek Pass history, citing the Colorado Historic Newspapers Collection (Alamosa Courier, Oct 23 1915, cost per mile; San Juan Prospector and Alamosa Journal, Aug 1916, opening ceremony) SkyHi News — "A historical timeline of the Colorado Department of Transportation's avalanche mitigation" (the snowshed built after three truck drivers were killed) Overdrive — "The Real C.W. McCall" (Bill Fries on the two truckers who lost their brakes and hit the Pagosa Springs feed store) Ouray County Plaindealer — "Rubber Duck, over and out," April 7, 2022 (Fries obituary, Ouray) CBS Colorado — beer truck runaway ramp incident (Trooper Josh Lewis) SnowBrains / CDLLife — March 20, 2025 runaway ramp footage, credited to Sarah and Brad Kinser via CDOT CBS Colorado — "Wreckage of deadly truck crash on Colorado mountain pass cleared from hillside," April 2026 (Nov. 3, 2025 crash; recovery operation; Lisa Schwantes)