How far is Hermiston, OR from Lake Oswego, OR?
The driving distance from Hermiston, OR to Lake Oswego, OR is about 191.8 miles (308.6 km), with a travel time of about 03h 14m by car.
- The straight-line flight distance is about 165.9 miles (267 km).
- For a round trip, plan for roughly 06h 28m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM PDT.
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 03h 14m.
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 county seat of Wasco County, Oregon, Unite States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy then Slight Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Hermiston and Lake Oswego.
Turn-by-Turn Driving Directions
Step-by-step road directions between Hermiston and Lake Oswego.
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1
Start on East Main Street
158 m · 16 sec · East Main Street
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2
Turn right onto North 1st Place
122 m · 19 sec · North 1st Place
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3
Turn left onto West Hermiston Avenue
1.5 km · 2 min · West Hermiston Avenue
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4
At the end of the road, turn left onto Southwest 11th Street
1.3 mi · 2 min · Southwest 11th Street
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5
Continue on Butter Creek Highway
2.8 mi · 4 min · Butter Creek Highway
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6
Take the ramp right
1606 ft · 39 sec
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7
Merge slight left onto Old Oregon Trail Highway
14.9 mi · 16 min · Old Oregon Trail Highway
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8
Continue on Columbia River Highway
158.3 mi · 2 hr 56 min · Columbia River Highway
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9
Continue on Banfield Freeway
6.8 mi · 9 min · Banfield Freeway
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10
Keep slight left to continue on I 5 South: Salem, OMSI, City Center
1906 ft · 32 sec
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11
Keep slight left to continue on I 5 South: Beaverton, Salem
80 m · 5 sec
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12
Merge slight left
1.6 mi · 2 min
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13
Take the exit slight right toward OR 43: Lake Oswego
1101 ft · 24 sec
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14
Turn straight onto South Hood Avenue
3.3 mi · 7 min · South Hood Avenue
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15
Continue on South Riverside Drive
2.2 mi · 4 min · South Riverside Drive
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16
Continue on North State Street
1511 ft · 53 sec · North State Street
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17
Turn right onto B Avenue
2111 ft · 1 min · B Avenue
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18
Turn left
80 m · 19 sec
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19
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Hermiston and Lake Oswego.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Columbia River Highway
Continue on Columbia River Highway
158 mi · 02h 56m
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 Hermiston and Mostly Cloudy then Slight Chance Rain Showers near Lake Oswego.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Hermiston to Lake Oswego?
The road trip is about 191.8 miles (308.6 km) and usually takes 03h 14m 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?
The Dalles is a useful midpoint, sitting about 96.7 miles from Hermiston and 95 miles from Lake Oswego.
How much longer is the road route than the straight-line distance?
The direct path is about 165.9 miles (267 km), while the road route adds roughly 25.9 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 PDT. If you want a more comfortable same-day return, try to leave by 10:32 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $33.52 one way or $67.04 round trip. Estimated CO2 is about 60.2 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Hermiston and Mostly Cloudy then Slight Chance Rain Showers near Lake Oswego.
Stop Ideas Near The Dalles
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to The Dalles.
The Dalles, Oregon
Wishram
Bingen – White Salmon
Hood River, Oregon
Flight Path Map
This map shows the direct air route between Hermiston and Lake Oswego. Straight-line distance: 165.91 mi (267 km).
#1 Hermiston
City in Oregon, USA
| Population | 17,791 |
| Coordinates | 45.8404100, -119.2894600 |
| Altitude | 140 |
| Country | United States |
#2 Lake Oswego
A city in Clackamas County, Oregon.
| Population | 39,821 |
| Coordinates | 45.4206700, -122.6706500 |
| Altitude | 55 |
| Country | United States |
End: (-122.670933, 45.420701)
Estimated Travel Time
Distance: 309 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 23m |
| 40 mph (64.37 km/h) | 04h 47m |
| 50 mph (80.47 km/h) | 03h 50m |
| 60 mph (96.56 km/h) | 03h 11m |
| 70 mph (112.65 km/h) | 02h 44m |
| 80 mph (129 km/h) | 02h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.95 | $33.52 | $67.04 |
| Mid-grade | $5.34 | $36.14 | $72.28 |
| Premium | $5.57 | $37.68 | $75.36 |
| Diesel | $6.37 | $43.10 | $86.20 |
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 Oregon · May 14, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.