2,600 mi
Total distance
~37.75 hrs
Driving time
4 days
3½ on the road
2 drivers
Rotating A → B
Time zones & clock
All gains, going west. Eastern → Central (Day 1, west of Nashville) → Mountain (Day 2, W. Nebraska). Day 3 crosses into Pacific as you near La Grande — Boise & Ontario are still Mountain. Day 4 is all Pacific. Net +3 hours, which keeps every arrival civil despite the long days.
Daily itinerary
1
Day 1
Knoxville → St. Joseph, MO
I-40 W → I-24 W (Nashville) → I-57 N → I-64 W (St. Louis) → I-70 W → I-29 N (St. Joseph)
800 mi
11h45
7:00a ET → ~7:15p CT
A 6h05 · B 5h40
B
1 Knoxville → Nashville, TN
2h45
A
2 Nashville → Mt. Vernon, IL
2h35
B
3 Mt. Vernon → Columbia, MO
2h55
A
4 Columbia → St. Joseph (via Kansas City)
3h30
📜 History as you roll past
Watch for — the Gateway Arch: crossing the Mississippi into St. Louis you'll glimpse the 630-ft arch off to the side — the monument to the westward push you're retracing. Lewis & Clark set out from here in 1804.
Leaving Nashville — Andrew Jackson's Hermitage sits just off I-40 to your east, and these hills were the field of the Battle of Nashville (Dec 1864), a final, crushing Confederate defeat.
Across Missouri — west of St. Louis, I-70 shadows the Missouri River for hours: the same current Lewis & Clark paddled against, passing St. Charles, their last resupply in 1804.
On to St. Joseph — you skirt Kansas City and Independence, the great jumping-off point where the Oregon, California & Santa Fe wagon trains began, and finish the day in St. Joseph: eastern terminus of the Pony Express (1860) and the town where Jesse James was shot in 1882.
2
Day 2
St. Joseph → Rock Springs, WY
I-29 N (Omaha) → I-80 W (Lincoln · North Platte · Cheyenne · Laramie · Rawlins) → Rock Springs
814 mi
11h45
6:30a CT → ~7:00p MT
A 5h30 · B 6h15
A
1 St. Joseph → Omaha, NE
1h50
B
2 Omaha → Kearney, NE
2h50
A
3 Kearney → Cheyenne, WY (via Sidney)
3h40
B
4 Cheyenne → Rock Springs (via Rawlins)
3h25
Early start — it's the longest day. Top off fuel leaving every town.
📜 History as you roll past
Watch for — The Archway, Kearney: you'll drive straight under a museum that spans all lanes of I-80, marking where the Oregon, California & Mormon Trails converged at old Fort Kearny.
I-80 = the Great Platte River Road — for ~300 miles the highway traces the Platte, the shared corridor of the wagon trails and the Pony Express; the river is often just off your shoulder.
Near Omaha — along the Missouri, Lewis & Clark held their first council with Native nations (Aug 1804). Omaha is also the eastern anchor of the transcontinental railroad.
North Platte & Sherman Hill — you pass Union Pacific's Bailey Yard (the world's largest rail yard), then later crest Sherman Hill, high point of the original railroad. Wyoming was first to give women the vote (1869).
Passing Rawlins — the town's claim to infamy: a local museum keeps shoes made from the skin of outlaw "Big Nose George," lynched here in 1881 — the West's most macabre relic.
Watch for — the Continental Divide: west of Rawlins, I-80 crosses it twice (a sign marks each), splitting around the Great Divide Basin — a strange high desert where rain reaches neither ocean.
Tonight in Rock Springs — a Union Pacific coal town that boomed in the 1870s; its immigrant "Chinatown" and the tragic 1885 labor riot are remembered at the local Historical Museum.
3
Day 3 · Longest day
Rock Springs → Yakima, WA
I-80 W → I-84 W splits near Echo, UT (bypasses SLC just N) → Twin Falls → Boise → La Grande → I-82 N (Tri-Cities → Yakima)
851 mi
12h15
7:00a MT → ~8:05p PT
A 6h05 · B 6h10
A
1 Rock Springs → Snowville, UT
3h05
B
2 Snowville → Mountain Home, ID
3h05
A
3 Mountain Home → La Grande, OR (via Boise)
3h00
B
4 La Grande → Yakima, WA (via Tri-Cities)
3h05
The big one — 12+ hours. Fuel leaving Rock Springs for the empty Utah stretch, again at Boise, and once more at the Tri-Cities before the run up to Yakima.
📜 History as you roll past
Green River, WY — the town where John Wesley Powell launched his boats in 1869 toward the Grand Canyon. Nearby Fort Bridger was a vital trail post; legendary South Pass lies in the hills to the north.
Into the Snake River Plain — dropping into Idaho, I-84 rejoins the Oregon/California Trail, which followed the Snake clear across the state. The deadly Three Island Crossing ford sat near Glenns Ferry.
Just off the freeway — south of your route near Twin Falls is the Snake River Canyon, where Evel Knievel tried to rocket across in 1974; Boise holds one of the largest Basque communities outside Spain.
Baker City & the Blue Mountains — a hillside near Baker City still holds a mile of original Oregon Trail wagon ruts; just beyond, you crest the Blue Mountains, the forested climb emigrants dreaded near journey's end.
Pendleton — home of the famous Round-Up rodeo (since 1910) and Pendleton Woolen Mills, on the lands of the Cayuse, Umatilla & Walla Walla peoples.
Watch for — the Columbia River: as I-84 meets the Columbia near Umatilla, you're on the river Lewis & Clark rode to the Pacific in 1805 — then you turn north over the river into Washington and the Tri-Cities.
Through the Tri-Cities — Kennewick, Pasco & Richland sit where the Yakima, Snake & Columbia meet; just upriver is the Hanford site, where the world's first full-scale reactor made the plutonium for the Trinity test and the Nagasaki bomb.
Tonight in Yakima — I-82 climbs into the Yakima Valley, the fruit-and-hop country that grows much of the nation's hops on the lands of the Yakama Nation; a century of irrigation canals turned this sagebrush desert green.
4
Day 4 · Arrive by 3pm
Yakima → Seattle, WA
I-82 → I-90 W over Snoqualmie Pass into Seattle
135 mi
2h00
8:30a PT → ~11:00a PT
A 1h20 · B 0h40
B
1 Yakima → Ellensburg, WA
0h40
A
2 Ellensburg → Seattle (Snoqualmie)
1h20
Just a 2-hour victory lap — sleep in. The only traffic-sensitive stretch is Snoqualmie Pass; you'll roll into Seattle by late morning.
📜 History as you roll past
Ellensburg & the Kittitas Valley — the old cattle-and-rodeo town in the Cascade foothills was a serious contender to be Washington's capital before Olympia won out; it's your last stop before the climb.
Watch for — Snoqualmie Pass: at 3,015 ft, I-90 crests the Cascades on the route surveyed for the northern railroad. The forested, often-misty climb is the green wall that separates dry eastern Washington from rainy Puget Sound.
Into Seattle — you finish at the saltwater port that outfitted the 1897 Klondike Gold Rush and grew from timber and Boeing into the city you're arriving in.
Total driving per person
19h00
Driver A
18h45
Driver B
Quick tips
Swaps = stops. Each driver swap doubles as a fuel/food/restroom break — keep to ~15–20 min and the arrival times hold.
Even out the load. Flip who's "A" on alternating days to share the early departures and the Seattle arrival shift.
Overnights: St. Joseph, MO · Rock Springs, WY · Yakima, WA.
Snoqualmie Pass needs no chains in June.