How far is Trenton, ME from Union, ME?
The driving distance from Trenton, ME to Union, ME is about 68.5 miles (110.3 km), with a travel time of about 01h 46m by car.
- The straight-line flight distance is about 47.3 miles (76.2 km).
- For a round trip, plan for roughly 03h 32m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
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 46m.
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 Waldo County, Maine, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Trenton and Union.
Turn-by-Turn Driving Directions
Step-by-step road directions between Trenton and Union.
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1
Start on Bar Harbor Road
5.5 mi · 10 min · Bar Harbor Road
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2
Continue on High Street
1.1 km · 2 min · High Street
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3
Turn left onto Beechland Road
1 mi · 2 min · Beechland Road
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4
At the end of the road, turn right onto Bayside Road
1 mi · 2 min · Bayside Road
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5
Continue on Water Street
1.3 km · 1 min · Water Street
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6
Turn left onto West Main Street
806 ft · 10 sec · West Main Street
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7
Keep slight right to continue on Main Street
85 m · 4 sec · Main Street
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8
Continue on Bucksport Road
8.5 mi · 10 min · Bucksport Road
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9
Continue on Acadia Highway
9.4 mi · 11 min · Acadia Highway
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10
Continue on Route 1
1.6 km · 1 min · Route 1
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11
Continue on Main Street
41 m · 9 sec · Main Street
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12
Turn left onto Route 1
682 ft · 17 sec · Route 1
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13
Continue on US Highway 1
1.2 mi · 3 min · US Highway 1
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14
Continue on Route 1
13.4 mi · 16 min · Route 1
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15
Continue on Searsport Avenue
2.7 mi · 5 min · Searsport Avenue
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16
Continue on Route 1
1.1 km · 1 min · Route 1
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17
Take the exit slight right
1414 ft · 39 sec
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18
Keep slight right
114 m · 12 sec
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19
Merge slight left onto Belmont Avenue
3.9 mi · 5 min · Belmont Avenue
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20
Continue on Augusta Road
2 mi · 2 min · Augusta Road
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21
Turn left onto Searsmont Road
26 m · 2 sec · Searsmont Road
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22
Keep slight right to continue on Searsmont Road
1.4 mi · 3 min · Searsmont Road
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23
Continue on Main Street North
2.4 mi · 6 min · Main Street North
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24
Continue on Searsmont Road
755 ft · 21 sec · Searsmont Road
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25
Continue on Main Street South
2.9 mi · 7 min · Main Street South
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26
Continue on Searmont Road
1.1 km · 2 min · Searmont Road
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27
Continue on Searsmont Road
2.4 mi · 6 min · Searsmont Road
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28
Turn left onto Sennebec Road
5.6 mi · 11 min · Sennebec Road
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29
Continue on Town House Road
1918 ft · 59 sec · Town House Road
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30
Turn left onto Common Road
12 m · 1 sec · Common Road
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31
Arrive at your destination
0 m · 1 sec · Common Road
Car Route Details
A richer read on the saved driving route between Trenton and Union.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Route 1
Continue on Route 1
13.4 mi · 00h 16m
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.
Sunny leaving Trenton and Sunny near Union.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Trenton to Union?
The road trip is about 68.5 miles (110.3 km) and usually takes 01h 46m 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?
Stockton Springs is a useful midpoint, sitting about 34.2 miles from Trenton and 34.3 miles from Union.
How much longer is the road route than the straight-line distance?
The direct path is about 47.3 miles (76.2 km), while the road route adds roughly 21.2 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 EDT. If you want a more comfortable same-day return, try to leave by 2:58 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $9.55 one way or $19.09 round trip. Estimated CO2 is about 21.5 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Trenton and Sunny near Union.
Stop Ideas Near Stockton Springs
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 Stockton Springs.
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Flight Path Map
This map shows the direct air route between Trenton and Union. Straight-line distance: 47.37 mi (76.24 km).
#1 Trenton
Town in Maine
| Population | 1,568 |
| Coordinates | 44.4389700, -68.3700200 |
| Altitude | 18 |
| Country | United States |
#2 Union
Town in Knox County, Maine, United States
| Population | 2,275 |
| Coordinates | 44.2114700, -69.2742100 |
| Altitude | 28 |
| Country | United States |
End: Union (-69.27421, 44.21147)
Estimated Travel Time
Distance: 110 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 16m |
| 40 mph (64.37 km/h) | 01h 42m |
| 50 mph (80.47 km/h) | 01h 22m |
| 60 mph (96.56 km/h) | 01h 08m |
| 70 mph (112.65 km/h) | 00h 58m |
| 80 mph (129 km/h) | 00h 51m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $9.55 | $19.09 |
| Mid-grade | $4.46 | $10.79 | $21.57 |
| Premium | $4.86 | $11.76 | $23.51 |
| Diesel | $6.00 | $14.51 | $29.03 |
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 Maine · Aug 29, 2026