Union, OR to Gresham, OR is 263.3 miles and takes about 4h 58m via Columbia River Highway, Old Oregon Trail Highway, and La Grande-Baker Highway, with a fuel budget near $55 and enough daylight to finish in a day. This trip stays within Oregon, connecting the Pacific Coast region from start to finish. Given that it's primarily surface roads, expect a more leisurely pace than a freeway drive. With a duration under five hours, it's a manageable one-day excursion, suitable for those who prefer to cover ground without feeling rushed. The route is designed for a single day of travel, allowing for flexibility in your schedule.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
131.6 miles from Union, OR
A natural place for your longest stop of the day
, about 2h 28m into the drive
.
Main Roads
Road
Distance
Duration
Columbia River Highway
151.6 mi
2h 47m
Old Oregon Trail Highway
96.7 mi
1h 45m
La Grande-Baker Highway
10.3 mi
15m
Northeast 223rd Avenue
1.6 mi
3m
Northeast Halsey Street
0.8 mi
1m
North Main Avenue
0.7 mi
1m
North Main Street
0.6 mi
<1m
Northeast 238th Drive
0.3 mi
<1m
Longest stretch:
Columbia River Highway
— 151.6 mi, about 2h 47m
Traffic on I-84
Hour-of-day weekday pattern from 36 FHWA count stations on your route.
Peak
2 PM
~751 veh/hr typical
· worst 1,207
Quietest
2 AM
~75 veh/hr
Peak-to-quiet ratio
10×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Union, OR and Gresham, OR.
1
Start on OR 203
69 ft·3 sec·East Beakman Street
2
Turn right onto OR 203; OR 237
0.6 mi·52 sec·North Main Street
3
Continue on OR 203
10 mi·15 min·La Grande-Baker Highway
4
Take the ramp onto I 84
0.2 mi·27 sec·I 84
5
Merge onto I 84
97 mi·1 hr 45 min·Old Oregon Trail Highway
Use the straight / slight right lanes.
6
Continue on I 84; US 30
152 mi·2 hr 47 min·Columbia River Highway
Use the straight lane.
7
Take the exit onto US 30 Bypass
0.2 mi·26 sec·US 30 Bypass
Exit 16Toward 238th Drive, Wood VillageUse the straight / slight right lanes.
8
Turn left onto US 30 Bypass
0.3 mi·46 sec·Northeast 238th Drive
Use the left / straight / right lanes.
9
Turn right onto Northeast Halsey Street
0.8 mi·1 min·Northeast Halsey Street
Use the straight lane.
10
Turn left onto Northeast 223rd Avenue
1.6 mi·3 min·Northeast 223rd Avenue
Use the left lane.
11
Turn slight left
277 ft·10 sec
12
Turn left onto Northwest Fairview Drive
0.2 mi·31 sec·Northwest Fairview Drive
Use the left lane.
13
Continue on North Main Avenue
0.7 mi·1 min·North Main Avenue
14
Turn right onto Northwest 1st Street
138 ft·9 sec·Northwest 1st Street
15
Turn left
63 ft·4 sec
16
Arrive at destination
Trip Plan
Starting your drive from Union in the morning will give you ample daylight to reach Gresham, a journey taking just under five hours. Since this is a single-day trip and primarily on surface roads, you have flexibility in when you depart. Plan for one stop to break up the 263.3 miles, especially considering the longest stretch is over 150 miles. Keep an eye on your fuel gauge, as dedicated fuel stations might be less frequent on these types of roads compared to interstates; the estimated fuel cost is around $55. A good tip is to ensure your vehicle is full before leaving Union to maximize your options.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 131.6 miles from Union, OR, or about 2h 28m into the drive.
The longest continuous stretch on this route runs about 151.6 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 58 miles or 1h 7m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 131.6 miles or 2h 28m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 1m
Traffic, exits, and arrival timing usually matter more near Gresham, OR than in the middle of the route.
Before You Leave
+
Open the route before leaving Union, OR so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Union, OR
This is one driving day of about 263.3 miles and 4h 58m.
Your first comfortable stop window is around 58 miles from Union, OR.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on Columbia River Highway for about 151.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 10
5 decision points cluster between mile 11.1 and 260.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
11.1 mi into trip|~16m in|I 84 / Old Oregon Trail Highway
Merge onto I 84 / Old Oregon Trail Highway
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
8
259.4 mi into trip|~4h 49m in|US 30 Bypass
Take the exit onto US 30 Bypass toward 238th Drive, Wood Village
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 16
Toward 238th Drive, Wood Village
5
259.6 mi into trip|~4h 50m in|US 30 Bypass / Northeast 238th Drive
Turn left onto US 30 Bypass / Northeast 238th Drive
Lane positioning matters here
Use the left / straight / right lanes.
5
259.9 mi into trip|~4h 50m in|Northeast Halsey Street
Turn right onto Northeast Halsey Street
Lane positioning matters here
Use the straight lane.
5
260.7 mi into trip|~4h 52m in|Northeast 223rd Avenue
Turn left onto Northeast 223rd Avenue
Lane positioning matters here
Use the left lane.
Fuel & Cost
Regular Gas
$46.66 one way
$93.32 round trip
$4.50/gal25.4 MPG avg92 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.82
$49.96
$99.93
premium
$5.04
$52.27
$104.53
diesel
$4.80
$49.72
$99.43
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$47
Meals
$25–$50
Total
$72–$97
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 92.1 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $28 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
79
0
$27.65
$12.64
Efficient EV
65.8
0
$23.04
$10.53
EV Truck/SUV
105.3
1
$36.86
$16.85
Gas CO2
92 kg
EV CO2
31 kg (66% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Jul 18, 2026
Origin
Union, OR
Late night
in Union on Sunday
Local time
3:10 AM
PDT
Current temp
56°F
Patchy Smoke
N 5 to 8 mph0% chanceLive forecast
Red Flag Warning
Red Flag Warning issued July 17 at 10:38PM PDT until July 18 at 10:00PM PDT by NWS Pendleton OR
Destination
Gresham, OR
Late night
in Gresham on Sunday
Local time
3:10 AM
PDT
Current temp
54°F
Mostly Clear
WNW 5 mph0% chanceLive forecast
Red Flag Warning
Red Flag Warning issued July 17 at 10:38PM PDT until July 18 at 10:00PM PDT by NWS Pendleton OR
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
2 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
4h 58m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
This drive consists entirely of surface roads, meaning you won't encounter any stretches on major highways. The longest continuous segment you'll navigate is 151.6 miles along the Columbia River Highway. Be prepared for a more rural cruising experience, as the lack of highway travel suggests more frequent intersections and potentially lower average speeds. You'll be covering 263.3 miles in total, with the entire route adhering to this surface road profile.
Only 0% highway — the rest is turn-by-turn surface driving.
16 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 151.6 mi on Columbia River Highway.
How Hard Is This Drive?
4/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. There are only a few real navigation decisions along the way. The trickiest moment comes around 11.1 miles in near I 84 / Old Oregon Trail Highway.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 4h 58m drive. You will face about 10 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 11.1 miles (I 84 / Old Oregon Trail Highway): Merge point - match speed before joining. Lane positioning matters here; at 259.4 miles (US 30 Bypass): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 259.6 miles (US 30 Bypass / Northeast 238th Drive): Lane positioning matters here.
Gresham is the fourth largest city within the state of Oregon, with a population of 114,000 in 2020. It's the home of an annual jazz festival. It is a part of the Portland Metropolitan Area and is generally considered a Portland suburb.
The downtown area of Gresham can be easily missed by those driving along W Powell Blvd, but has a handful of restaurants and shops to offer, as well as Main City Park.
Top landmarks
•Charles and Fae Olson House — historic house in Gresham, Oregon, USA
•Dr. Herbert H. Hughes House — historic house in Gresham, Oregon, USA
•Emanuel and Christina Anderson House — historic house in Gresham, Oregon, USA
The longest stretch is about 151.6 miles on Columbia River Highway. The full list of main roads is in the Roads section above.
Yes — we found about 24 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
The main spots that need attention: at 11.1 miles (I 84 / Old Oregon Trail Highway): Merge point - match speed before joining. Lane positioning matters here; at 259.4 miles (US 30 Bypass): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 259.6 miles (US 30 Bypass / Northeast 238th Drive): Lane positioning matters here.
Possible but tiring. At 5.0 hours each way, an in-and-out day trip would put you behind the wheel for 10.0 hours — manageable with a long break at Gresham, OR, but most travelers stay overnight.
