How far is Lake Oswego, OR from Saint Helens, OR?
The driving distance from Lake Oswego, OR to Saint Helens, OR is about 37.7 miles (60.7 km), with a travel time of about 01h 04m by car.
- The straight-line flight distance is about 31.3 miles (50.4 km).
- For a round trip, plan for roughly 02h 08m 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 04m.
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.
Unincorporated community in Washington County, Oregon, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Light Rain Likely
Chance Light Rain
Driving Route Map
The map below follows the saved road route between Lake Oswego and Saint Helens.
Turn-by-Turn Driving Directions
Step-by-step road directions between Lake Oswego and Saint Helens.
-
1
Start on the route
28 m · 9 sec
-
2
Turn right
48 m · 17 sec
-
3
Turn left onto Sixth Street
53 m · 10 sec · Sixth Street
-
4
Turn right onto B Avenue
1952 ft · 1 min · B Avenue
-
5
At the end of the road, turn left onto North State Street
1509 ft · 52 sec · North State Street
-
6
Turn left onto Southwest Terwilliger Boulevard
1.1 km · 1 min · Southwest Terwilliger Boulevard
-
7
Continue on South Terwilliger Boulevard
1.6 mi · 3 min · South Terwilliger Boulevard
-
8
Enter the roundabout and take exit 2 toward South Terwilliger Boulevard
38 m · 3 sec · South Terwilliger Boulevard
-
9
Exit the roundabout onto South Terwilliger Boulevard
60 m · 5 sec · South Terwilliger Boulevard
-
10
Continue on Southwest Terwilliger Boulevard
1.4 mi · 3 min · Southwest Terwilliger Boulevard
-
11
Take the ramp slight right toward I 5 North
1847 ft · 47 sec
-
12
Merge slight left onto Terwilliger Curves
2.2 mi · 3 min · Terwilliger Curves
-
13
Keep slight left to continue on Stadium Freeway
2.7 mi · 4 min · Stadium Freeway
-
14
Take the exit slight left toward US 30 West: Saint Helens
2400 ft · 45 sec
-
15
Continue straight
26.7 mi · 43 min
-
16
Turn right onto Columbia Boulevard
1.4 km · 2 min · Columbia Boulevard
-
17
Turn right onto South 8th Street
27 m · 4 sec · South 8th Street
-
18
Arrive at your destination
0 m · 1 sec · South 8th Street
Car Route Details
A richer read on the saved driving route between Lake Oswego and Saint Helens.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
US 30 West
Continue straight
26.7 mi · 00h 43m
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.
Light Rain Likely leaving Lake Oswego and Chance Light Rain near Saint Helens.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Lake Oswego to Saint Helens?
The road trip is about 37.7 miles (60.7 km) and usually takes 01h 04m 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?
Bethany is a useful midpoint, sitting about 18.8 miles from Lake Oswego and 18.8 miles from Saint Helens.
How much longer is the road route than the straight-line distance?
The direct path is about 31.3 miles (50.4 km), while the road route adds roughly 6.4 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 4:22 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.58 one way or $13.17 round trip. Estimated CO2 is about 11.8 kg one way.
What should you check before leaving?
Before you leave, expect Light Rain Likely around Lake Oswego and Chance Light Rain near Saint Helens.
Stop Ideas Near Bethany
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Powell's City of Books
Bureau of Planning and Sustainability
City Hall/SW 5th & Jefferson
Sunrise Park (City Of Tigard park)
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Bethany.
Portland, OR
Union Station
Vancouver station
Manning, Oregon
Flight Path Map
This map shows the direct air route between Lake Oswego and Saint Helens. Straight-line distance: 31.32 mi (50.41 km).
#1 Lake Oswego
A city in Clackamas County, Oregon.
| Population | 39,821 |
| Coordinates | 45.4206700, -122.6706500 |
| Altitude | 55 |
| Country | United States |
#2 Saint Helens
City in Oregon, USA
| Population | 14,071 |
| Coordinates | 45.8640000, -122.8064900 |
| Altitude | 27 |
| Country | United States |
End: Saint Helens (-122.80649, 45.864)
Estimated Travel Time
Distance: 61 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 15m |
| 40 mph (64.37 km/h) | 00h 56m |
| 50 mph (80.47 km/h) | 00h 45m |
| 60 mph (96.56 km/h) | 00h 37m |
| 70 mph (112.65 km/h) | 00h 32m |
| 80 mph (129 km/h) | 00h 28m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.95 | $6.58 | $13.17 |
| Mid-grade | $5.34 | $7.10 | $14.20 |
| Premium | $5.57 | $7.40 | $14.81 |
| Diesel | $6.37 | $8.47 | $16.93 |
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 · Apr 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.