How far is Colebrook, NH from Merrimack, NH?
The driving distance from Colebrook, NH to Merrimack, NH is about 164.5 miles (264.7 km), with a travel time of about 02h 58m by car.
- The straight-line flight distance is about 140.2 miles (225.7 km).
- For a round trip, plan for roughly 05h 57m 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 02h 58m.
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.
Town in Grafton County, New Hampshire, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Rain Showers
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Colebrook and Merrimack.
Turn-by-Turn Driving Directions
Step-by-step road directions between Colebrook and Merrimack.
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1
Start on Pleasant Street
45 m · 11 sec · Pleasant Street
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2
Turn left onto Main Street
1181 ft · 20 sec · Main Street
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3
Continue on US Route 3
1.6 mi · 2 min · US Route 3
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4
Continue on Daniel Webster Highway
8.1 mi · 12 min · Daniel Webster Highway
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5
Continue on US Route 3
3.3 mi · 5 min · US Route 3
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6
Continue on Daniel Webster Highway
12.3 mi · 18 min · Daniel Webster Highway
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7
Continue on State Street
1594 ft · 27 sec · State Street
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8
Continue on Church Street
965 ft · 26 sec · Church Street
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9
Continue on Main Street
2.8 mi · 5 min · Main Street
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10
Continue on Lancaster Road
1.2 mi · 2 min · Lancaster Road
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11
Continue on Main Street
5.2 mi · 8 min · Main Street
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12
Enter the roundabout and take exit 2 toward Main Street
51 m · 5 sec · Main Street
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13
Exit the roundabout onto Main Street
1.3 km · 2 min · Main Street
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14
Turn slight right onto Prospect Street
6.3 mi · 9 min · Prospect Street
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15
Continue on Lancaster Road
2 mi · 3 min · Lancaster Road
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16
Continue on Daniel Webster Highway
142 m · 11 sec · Daniel Webster Highway
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17
Continue on Twin Mountain Road
2.3 mi · 4 min · Twin Mountain Road
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18
Continue on US Route 3 North
6.1 mi · 9 min · US Route 3 North
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19
Continue on US Route 3 South
140 m · 15 sec · US Route 3 South
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20
Turn slight right onto US Route 3 South
1.9 mi · 3 min · US Route 3 South
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21
Continue on Daniel Webster Highway
7.8 mi · 12 min · Daniel Webster Highway
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22
Take the ramp straight
8.2 mi · 13 min
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23
Continue on Styles Bridges Highway
50.5 mi · 54 min · Styles Bridges Highway
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24
Continue on Senator Styles Bridges Highway
15.4 mi · 18 min · Senator Styles Bridges Highway
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25
Continue on Styles Bridges Highway
1.2 km · 1 min · Styles Bridges Highway
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26
Continue on Everett Turnpike
8.9 mi · 11 min · Everett Turnpike
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27
Keep slight left to continue on Everett Turnpike
2 mi · 2 min · Everett Turnpike
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28
Keep slight left to continue on Everett Turnpike
8.2 mi · 11 min · Everett Turnpike
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29
Keep slight left to continue on Everett Turnpike
2.4 mi · 3 min · Everett Turnpike
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30
Take the exit slight right toward Airport
1.3 km · 1 min
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31
Keep slight right to continue on Merrimack
1425 ft · 38 sec
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32
Turn right onto South River Road
704 ft · 13 sec · South River Road
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33
Continue on Daniel Webster Highway
3.8 mi · 8 min · Daniel Webster Highway
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34
Turn slight left onto Loop Road
25 m · 4 sec · Loop Road
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35
Arrive at your destination
0 m · 1 sec · Loop Road
Car Route Details
A richer read on the saved driving route between Colebrook and Merrimack.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Styles Bridges Highway
Continue on Styles Bridges Highway
50.5 mi · 00h 54m
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.
Slight Chance Rain Showers leaving Colebrook and Mostly Sunny near Merrimack.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Colebrook to Merrimack?
The road trip is about 164.5 miles (264.7 km) and usually takes 02h 58m 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?
Woodstock is a useful midpoint, sitting about 82.1 miles from Colebrook and 82.4 miles from Merrimack.
How much longer is the road route than the straight-line distance?
The direct path is about 140.2 miles (225.7 km), while the road route adds roughly 24.3 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 12:32 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $22.88 one way or $45.76 round trip. Estimated CO2 is about 51.5 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Rain Showers around Colebrook and Mostly Sunny near Merrimack.
Stop Ideas Near Woodstock
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 Woodstock.
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Flight Path Map
This map shows the direct air route between Colebrook and Merrimack. Straight-line distance: 140.22 mi (225.66 km).
#1 Colebrook
City in Coös County, New Hampshire, United States of America
| Population | 2,134 |
| Coordinates | 44.8944900, -71.4959200 |
| Altitude | 313 |
| Country | United States |
#2 Merrimack
River in New Hampshire and Massachusetts, United States
| Population | 27,452 |
| Coordinates | 42.8650900, -71.4934000 |
| Altitude | 47 |
| Country | United States |
End: (-71.493333, 42.865106)
Estimated Travel Time
Distance: 265 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 28m |
| 40 mph (64.37 km/h) | 04h 06m |
| 50 mph (80.47 km/h) | 03h 17m |
| 60 mph (96.56 km/h) | 02h 44m |
| 70 mph (112.65 km/h) | 02h 20m |
| 80 mph (129 km/h) | 02h 03m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $22.88 | $45.76 |
| Mid-grade | $4.46 | $25.85 | $51.70 |
| Premium | $4.86 | $28.18 | $56.35 |
| Diesel | $6.00 | $34.78 | $69.57 |
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 New Hampshire · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.