How far is Monmouth, OR from Lake Oswego, OR?
The driving distance from Monmouth, OR to Lake Oswego, OR is about 57.2 miles (92.1 km), with a travel time of about 01h 08m by car.
- The straight-line flight distance is about 48.2 miles (77.5 km).
- For a round trip, plan for roughly 02h 17m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM PDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 01h 08m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 Oregon, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Monmouth and Lake Oswego.
Turn-by-Turn Driving Directions
Step-by-step road directions between Monmouth and Lake Oswego.
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1
Start on Main Street East
1.1 km · 1 min · Main Street East
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2
Turn straight onto Monmouth Independence Highway
1874 ft · 32 sec · Monmouth Independence Highway
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3
Continue on Monmouth Street
1.5 mi · 2 min · Monmouth Street
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4
At the end of the road, turn left onto South Main Street
1.4 km · 1 min · South Main Street
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5
Continue on Independence Highway
5.4 mi · 8 min · Independence Highway
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6
Take the ramp straight toward OR 22 East: Salem
855 ft · 13 sec · Salem Dallas Highway Northwest
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7
Merge slight left onto Salem Dallas Highway Northwest
4.8 mi · 7 min · Salem Dallas Highway Northwest
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8
Keep slight right to continue on Center Street Bridge
2961 ft · 1 min · Center Street Bridge
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9
Take the exit slight left toward OR 99E Business North: Keizer, Portland
707 ft · 33 sec
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10
Turn right onto Front Street Northeast
1189 ft · 33 sec · Front Street Northeast
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11
Turn left onto Commercial Street Northeast
1256 ft · 36 sec · Commercial Street Northeast
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12
Continue on Liberty Street Northeast
1.1 mi · 3 min · Liberty Street Northeast
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13
Turn right onto Doctor Martin Luther King Junior Parkway
3.1 mi · 5 min · Doctor Martin Luther King Junior Parkway
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14
Keep slight left to continue on I 5 North: Portland
31.2 mi · 37 min
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15
Take the exit slight right toward Carman Drive
1236 ft · 26 sec
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16
Turn right onto Upper Boones Ferry Road
48 m · 4 sec · Upper Boones Ferry Road
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17
Continue on Carman Drive
1.1 mi · 2 min · Carman Drive
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18
Enter the roundabout and take exit 2 toward Meadows and Carman Circle
28 m · 5 sec · Carman Drive
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19
Exit the rotary onto Carman Drive
152 m · 22 sec · Carman Drive
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20
Turn right onto Kruse Way
2325 ft · 1 min · Kruse Way
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21
At the end of the road, turn left onto Boones Ferry Road
1.1 km · 1 min · Boones Ferry Road
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22
Turn slight right
546 ft · 13 sec
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23
Turn straight onto Country Club Road
1.6 mi · 3 min · Country Club Road
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24
Continue on A Avenue
1157 ft · 38 sec · A Avenue
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25
Turn left
65 m · 16 sec
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26
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Monmouth 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.
I 5 North
Keep slight left to continue on I 5 North: Portland
31.2 mi · 00h 37m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Partly Sunny leaving Monmouth and Mostly Sunny near Lake Oswego.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Monmouth to Lake Oswego?
The road trip is about 57.2 miles (92.1 km) and usually takes 01h 08m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Gervais is a useful midpoint, sitting about 27.5 miles from Monmouth and 29.8 miles from Lake Oswego.
How much longer is the road route than the straight-line distance?
The direct path is about 48.2 miles (77.5 km), while the road route adds roughly 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 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 4:12 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $10.00 one way or $20.00 round trip. Estimated CO2 is about 18 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Monmouth and Mostly Sunny near Lake Oswego.
Stop Ideas Near Gervais
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Salem city park
Woodburn City Hall
Palmer Creek Lodge Community Event Center
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Gervais.
Woodburn, OR
Salem station
Oregon City station
Portland, OR
Flight Path Map
This map shows the direct air route between Monmouth and Lake Oswego. Straight-line distance: 48.14 mi (77.47 km).
#1 Monmouth
City in Oregon, USA
| Population | 10,615 |
| Coordinates | 44.8484500, -123.2339900 |
| Altitude | 62 |
| 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: 92 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 54m |
| 40 mph (64.37 km/h) | 01h 25m |
| 50 mph (80.47 km/h) | 01h 08m |
| 60 mph (96.56 km/h) | 00h 57m |
| 70 mph (112.65 km/h) | 00h 49m |
| 80 mph (129 km/h) | 00h 42m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.95 | $10.00 | $20.00 |
| Mid-grade | $5.34 | $10.78 | $21.57 |
| Premium | $5.57 | $11.24 | $22.49 |
| Diesel | $6.37 | $12.86 | $25.72 |
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 12, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.