How far is Thermopolis, WY from Green River, WY?
The driving distance from Thermopolis, WY to Green River, WY is about 208.1 miles (334.9 km), with a travel time of about 04h 02m by car.
- The straight-line flight distance is about 159.6 miles (256.9 km).
- For a round trip, plan for roughly 08h 04m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 04h 02m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in, and the county seat of, Fremont County, Wyoming, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Mostly Sunny then Slight Chance T-storms
Driving Route Map
The map below follows the saved road route between Thermopolis and Green River.
Turn-by-Turn Driving Directions
Step-by-step road directions between Thermopolis and Green River.
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1
Start on South 6th Street
2765 ft · 1 min · South 6th Street
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2
Turn right onto Shoshoni Street
1.4 km · 2 min · Shoshoni Street
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3
Continue straight
31 mi · 36 min
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4
Turn right onto West 2nd Street
18.2 mi · 21 min · West 2nd Street
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5
Continue straight
18.9 mi · 22 min
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6
Continue on South Main Street
9.8 mi · 12 min · South Main Street
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7
Turn left onto East Main Street
8.4 mi · 10 min · East Main Street
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8
Continue on Highway 28
66.5 mi · 1 hr 16 min · Highway 28
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9
Turn left onto Farson Mercantile
38.1 mi · 43 min · Farson Mercantile
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10
Continue on Elk Street
1.4 km · 2 min · Elk Street
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11
Take the exit left
1736 ft · 42 sec
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12
Merge slight left onto Dwight D. Eisenhower Highway
12.7 mi · 13 min · Dwight D. Eisenhower Highway
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13
Take the exit slight right toward I 80 Business West, US 30 Business West: Green River
1.9 mi · 4 min
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14
Turn right onto North 1st East
11 m · 2 sec · North 1st East
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15
Arrive at your destination
0 m · 1 sec · North 1st East
Car Route Details
A richer read on the saved driving route between Thermopolis and Green River.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Highway 28
Continue on Highway 28
66.5 mi · 01h 16m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Thermopolis and Mostly Sunny then Slight Chance T-storms near Green River.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Thermopolis to Green River?
The road trip is about 208.1 miles (334.9 km) and usually takes 04h 02m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Lander is a useful midpoint, sitting about 104 miles from Thermopolis and 104.1 miles from Green River.
How much longer is the road route than the straight-line distance?
The direct path is about 159.6 miles (256.9 km), while the road route adds roughly 48.5 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 8:56 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.57 one way or $57.15 round trip. Estimated CO2 is about 65.2 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Thermopolis and Mostly Sunny then Slight Chance T-storms near Green River.
Flight Path Map
This map shows the direct air route between Thermopolis and Green River. Straight-line distance: 159.61 mi (256.86 km).
#1 Thermopolis
Town of the United States
| Population | 2,770 |
| Coordinates | 43.6460700, -108.2120400 |
| Altitude | 1320 |
| Country | United States |
#2 Green River
River in Wyoming, Utah, and Colorado, in the United States, that is a tributary of the Colorado River
| Population | 11,788 |
| Coordinates | 41.5285800, -109.4662500 |
| Altitude | 1864 |
| Country | United States |
End: North 1st East (-109.466324, 41.528621)
Estimated Travel Time
Distance: 335 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 56m |
| 40 mph (64.37 km/h) | 05h 12m |
| 50 mph (80.47 km/h) | 04h 09m |
| 60 mph (96.56 km/h) | 03h 28m |
| 70 mph (112.65 km/h) | 02h 58m |
| 80 mph (129 km/h) | 02h 35m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $28.57 | $57.15 |
| Mid-grade | $4.23 | $31.06 | $62.11 |
| Premium | $4.55 | $33.39 | $66.78 |
| Diesel | $5.41 | $39.72 | $79.45 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Wyoming · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.