Travelers along eastbound Interstate 80 may get confused by the county line markers as they navigate the high country of the Sierra Nevada.
Following the meandering course of the North Fork of the Yuba River, the Placer-Nevada boundaries play leapfrog across the highway.
Truckee, Nevada County’s eastern-most city, sits between Placer County tracts, adding to the disorientation. But the blurring of the Placer-Nevada borders seems fitting, considering they have deep roots entwined in common pioneer and railroad history.
Before gold fever infected people around the world, folks were migrating westward across North America to explore, exploit or claim a piece of the frontier wilderness. Many journeyed along the Overland Emigrant Trail, with mountaineers leading convoys of covered wagons out of the plains, through the Rockies, across the Humboldt Desert to the sawtooth spine of the Sierra Nevada.
Several gaps were used to clamber more than 11,000 feet high over the 430-mile-long mountain range. But in the fall of 1844, trail guide Elisha Stevens took the advice of a helpful Paiute Indian chief named Truckee and blazed a new path through the craggy Sierra that would eventually be dubbed Donner Pass. The river, basin and outpost on that route became known as Truckee.
Stevens ended up settling near Colfax and operating a toll road to outlying mining camps. The Stevens Trail on the east side of Colfax takes hikers down 1,000 feet into the canyon of the North Fork of the American River.
Over the next few years, thousands of pioneer settlers made the arduous journey up and down the sheer cliffs and rocky tors of Donner Pass to reach the end of the line at Johnson’s Ranch near Wheatland. Today, the remnants of the historic Overland Emigrant Trail cut through Placer and Nevada counties, just as the modern freeway does.
When engineers for the Central Pacific Railroad plotted its course through this same general territory in 1865, Placer and Nevada counties again became united; this time by the reins of the iron horse. The western leg of the Transcontinental Railroad steamed through many Placer encampments before arriving in Truckee for the final push across the Sierra.
The two boroughs also shared the spotlight when Placer County’s Squaw Valley became the site of the VIII Winter Olympic games in 1960.
When Squaw Valley was awarded the honor, it was little more than a few tow ropes, one chairlift and a 50-room inn. And U.S. 40, the fair-weather access road into the Sierra, often was closed by winter storms that flogged the lofty peaks and clogged the mountain passes.
Once it became official that the Olympics were coming to the region, infrastructure had to be put in place. A new highway was needed to deliver laborers, contestants, officials, judges, spectators and vendors to the site of the Olympic Village. Hotels, restaurants, chairlifts, ski jumps, a speed skating oval, an ice skating pavilion and connecting roads and bridges all were crucial to a successful event. And there had to be a lodge to accommodate the more than 750 competitors.
Construction began on Interstate 80 in the late 1950s, generally following U.S. 40, sometimes veering away from the route, often overlaying it. At the higher elevations, the modern byway even flowed over portions of the Overland Emigrant Trail.
Truckee flourished as neighboring Squaw Valley blossomed into the Olympic Village.
Today, Truckee is a vibrant community, with a variety of museums and a weathered historic district full of quaint eateries and boutiques. The train tracks still dominate the core of the city, with I-80 dividing the older precincts from fresh subdivisions of upscale mountain lodges and vacation cabins tucked into the folds of the forest.
Just as previous trails have done, I-80 zigzags across Placer-Nevada’s individual boundaries. But the manmade demarcation will never break the historic ties that bind them.









