How far is Dennis, MA from Old Harbor, MA?
The driving distance from Dennis, MA to Old Harbor, MA is about 18.2 miles (29.3 km), with a travel time of about 00h 37m by car.
- The straight-line flight distance is about 14.4 miles (23.1 km).
- For a round trip, plan for roughly 01h 15m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM EST.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 00h 37m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
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 on Cape Cod, in Barnstable County in the state of Massachusetts
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain
Rain
Driving Route Map
The map below follows the saved road route between Dennis and Old Harbor.
Turn-by-Turn Driving Directions
Step-by-step road directions between Dennis and Old Harbor.
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1
Start on the route
59 m · 15 sec
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2
Turn right onto Route 6A
1137 ft · 26 sec · Route 6A
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3
Turn right onto Old Bass River Road
909 ft · 18 sec · Old Bass River Road
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4
Continue on Old Bass River Road
3 mi · 5 min · Old Bass River Road
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5
Turn left onto Bob Crowell Road
1861 ft · 37 sec · Bob Crowell Road
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6
Turn right onto East West Dennis Road
2461 ft · 57 sec · East West Dennis Road
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7
Take the ramp slight right toward US 6 East: Orleans, Provincetown
1437 ft · 36 sec
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8
Merge slight left onto Mid Cape Highway
3.8 mi · 6 min · Mid Cape Highway
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9
Take the exit slight right toward MA 124: Harwich, Brewster
1250 ft · 36 sec
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10
Keep slight right to continue on MA 124 South: Harwich, Harwich Port
58 m · 6 sec
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11
Turn straight onto Pleasant Lake Avenue
111 m · 16 sec · Pleasant Lake Avenue
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12
Turn left onto Queen Anne Road
2.3 mi · 4 min · Queen Anne Road
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13
Enter the roundabout and take exit 2 toward Queen Anne Road
31 m · 2 sec · Queen Anne Road
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14
Exit the roundabout onto Queen Anne Road
1 km · 1 min · Queen Anne Road
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15
Continue on Old Queen Anne Road
1.2 mi · 2 min · Old Queen Anne Road
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16
Continue on Old Queen Anne Road
1.6 mi · 3 min · Old Queen Anne Road
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17
Turn left onto Main Street
1.1 km · 1 min · Main Street
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18
Enter the roundabout and take exit 3 toward Main Street
27 m · 2 sec · Main Street
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19
Exit the roundabout onto Main Street
1.2 km · 1 min · Main Street
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20
At the end of the road, turn right onto Main Street
2571 ft · 1 min · Main Street
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21
Turn straight onto Morris Island Road
1282 ft · 57 sec · Morris Island Road
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22
Continue on Morris Island Road
1.3 km · 3 min · Morris Island Road
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23
Continue on Tisquantum Road
1706 ft · 1 min · Tisquantum Road
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24
Turn left onto Access Trail
601 ft · 1 min · Access Trail
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25
Continue on Monomoy NWR Nature Trail
1059 ft · 2 min · Monomoy NWR Nature Trail
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26
Arrive at your destination
0 m · 1 sec · Monomoy NWR Nature Trail
Car Route Details
A richer read on the saved driving route between Dennis and Old Harbor.
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.
Mid Cape Highway
Merge slight left onto Mid Cape Highway
3.84 mi · 00h 06m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Rain leaving Dennis and Rain near Old Harbor.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Dennis to Old Harbor?
The road trip is about 18.2 miles (29.3 km) and usually takes 00h 37m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Harwich is a useful midpoint, sitting about 9.1 miles from Dennis and 9.1 miles from Old Harbor.
How much longer is the road route than the straight-line distance?
The direct path is about 14.4 miles (23.1 km), while the road route adds roughly 3.8 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 7:00 AM to 7:00 PM EST. If you want a more comfortable same-day return, try to leave by 7:14 PM EST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.65 one way or $5.30 round trip. Estimated CO2 is about 5.7 kg one way.
What should you check before leaving?
Before you leave, expect Rain around Dennis and Rain near Old Harbor.
Stop Ideas Near Harwich
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 Harwich.
Route 128 station
South Station
Back Bay station
North Station
Flight Path Map
This map shows the direct air route between Dennis and Old Harbor. Straight-line distance: 14.35 mi (23.1 km).
#1 Dennis
Town in Barnstable County, Massachusetts, United States
| Population | 13,890 |
| Coordinates | 41.7353900, -70.1939100 |
| Altitude | 5 |
| Country | United States |
#2 Old Harbor
Old Harbor is a place in Massachusetts, United States.
| Population | 0 |
| Coordinates | 41.6001100, -69.9827900 |
| Altitude | 2 |
| Country | United States |
End: Old Harbor (-69.98279, 41.60011)
Estimated Travel Time
Distance: 29 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 36m |
| 40 mph (64.37 km/h) | 00h 27m |
| 50 mph (80.47 km/h) | 00h 21m |
| 60 mph (96.56 km/h) | 00h 18m |
| 70 mph (112.65 km/h) | 00h 15m |
| 80 mph (129 km/h) | 00h 13m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.14 | $2.65 | $5.30 |
| Mid-grade | $4.82 | $3.08 | $6.16 |
| Premium | $5.23 | $3.34 | $6.69 |
| Diesel | $6.30 | $4.03 | $8.07 |
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 Massachusetts · Nov 06, 2026