How far is Decatur, AL from Mountain Brook, AL?
The driving distance from Decatur, AL to Mountain Brook, AL is about 86.5 miles (139.2 km), with a travel time of about 01h 44m by car.
- The straight-line flight distance is about 77.5 miles (124.7 km).
- For a round trip, plan for roughly 03h 29m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
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 44m.
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.
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 Decatur and Mountain Brook.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Mountain Brook.
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1
Start on the route
130 m · 37 sec
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2
At the end of the road, turn left onto Ferry Street Northeast
50 m · 9 sec · Ferry Street Northeast
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3
Turn left onto Lee Street Northeast
1583 ft · 53 sec · Lee Street Northeast
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4
At the end of the road, turn right onto 6th Avenue Northeast
580 ft · 15 sec · 6th Avenue Northeast
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5
Continue on 6th Avenue Southeast
3 mi · 6 min · 6th Avenue Southeast
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6
Turn left onto Point Mallard Parkway
4.2 mi · 6 min · Point Mallard Parkway
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7
Take the ramp slight right toward I-65 South: Birmingham
1944 ft · 47 sec
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8
Merge slight left
67.1 mi · 1 hr 12 min
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9
Take the exit slight right toward I 22 West, US 31: Memphis, Fultondale
2715 ft · 38 sec
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10
Keep slight left to continue on I 22 West: Memphis
2666 ft · 38 sec
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11
Keep slight left to continue on Montgomery
1940 ft · 28 sec
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12
Merge slight left
3.9 mi · 5 min
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13
Take the exit slight left toward I 20 East, I 59 North: Atlanta, Gadsden
1037 ft · 25 sec
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14
Merge slight right
1 mi · 2 min
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15
Take the exit slight right toward US 31, US 280: Carraway Boulevard, Downtown
1261 ft · 31 sec
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16
Keep slight left to continue on US 31 South, US 280 East
2557 ft · 1 min
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17
Merge slight left onto Red Mountain Expressway
1.4 km · 1 min · Red Mountain Expressway
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18
Take the exit slight right toward University Boulevard
1256 ft · 32 sec
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19
Turn right onto University Boulevard
615 ft · 18 sec · University Boulevard
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20
Turn left onto 24th Street South
932 ft · 19 sec · 24th Street South
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21
Turn slight left onto 10th Avenue South
122 m · 8 sec · 10th Avenue South
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22
Continue on 26th Street South
1685 ft · 36 sec · 26th Street South
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23
Continue on Niazuma Avenue South
1304 ft · 26 sec · Niazuma Avenue South
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24
Turn straight onto Pawnee Avenue South
1984 ft · 40 sec · Pawnee Avenue South
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25
Continue on Country Club Road South
2094 ft · 42 sec · Country Club Road South
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26
Turn straight onto Montclair Road
2864 ft · 60 sec · Montclair Road
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27
Turn right onto Memory Lane
1390 ft · 38 sec · Memory Lane
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28
Turn slight left onto Country Club Road
64 m · 8 sec · Country Club Road
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29
Continue on Euclid Avenue
147 m · 16 sec · Euclid Avenue
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30
Turn right onto Church Street
1827 ft · 52 sec · Church Street
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31
Arrive at your destination
0 m · 1 sec · Church Street
Car Route Details
A richer read on the saved driving route between Decatur and Mountain Brook.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I-65 South
Merge slight left
67.1 mi · 01h 12m
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 Decatur and Sunny near Mountain Brook.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Mountain Brook?
The road trip is about 86.5 miles (139.2 km) and usually takes 01h 44m 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?
Dodge City is a useful midpoint, sitting about 43.3 miles from Decatur and 43.2 miles from Mountain Brook.
How much longer is the road route than the straight-line distance?
The direct path is about 77.5 miles (124.7 km), while the road route adds roughly 9 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 CDT. If you want a more comfortable same-day return, try to leave by 3:00 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $11.55 one way or $23.10 round trip. Estimated CO2 is about 27.1 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Decatur and Sunny near Mountain Brook.
Stop Ideas Near Dodge City
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 Dodge City.
Birmingham
Anniston
Tuscaloosa
Flight Path Map
This map shows the direct air route between Decatur and Mountain Brook. Straight-line distance: 77.48 mi (124.7 km).
#1 Decatur
The most populous city in Morgan County, Alabama.
| Population | 54,381 |
| Coordinates | 34.6059300, -86.9833400 |
| Altitude | 171 |
| Country | United States |
#2 Mountain Brook
City in southeastern Jefferson County, Alabama
| Population | 20,413 |
| Coordinates | 33.5009400, -86.7522100 |
| Altitude | 234 |
| Country | United States |
End: Mountain Brook (-86.75221, 33.50094)
Estimated Travel Time
Distance: 139 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 52m |
| 40 mph (64.37 km/h) | 02h 09m |
| 50 mph (80.47 km/h) | 01h 43m |
| 60 mph (96.56 km/h) | 01h 26m |
| 70 mph (112.65 km/h) | 01h 14m |
| 80 mph (129 km/h) | 01h 04m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.79 | $11.55 | $23.10 |
| Mid-grade | $4.26 | $12.99 | $25.98 |
| Premium | $4.63 | $14.11 | $28.21 |
| Diesel | $5.42 | $16.52 | $33.03 |
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 Alabama · 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.