The drive from Greenfield, TN to Chattanooga, TN covers 269.9 miles and takes about 5h 16m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 24, I 40, Tennessee National Guard Parkway for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 103.1 miles on I 24.
At current regular gas prices, budget about $42.20 one way before food or hotel costs.
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
134.9 miles from Greenfield, TN
A natural place for your longest stop of the day
, about 2h 46m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 5h 16m. Total distance: 269.9 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 16m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (91%). Some complex stretches to watch for.
Drive Character
This is a 5h 16m highway drive covering 269.9 miles, with most of the trip on I 24 and I 40. The longest continuous stretch is about 103.1 miles on I 24.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 24 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 24 is the longest continuous segment at about 103.1 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 24 and I 40. You will hit about 13 points where you need to pay attention to lane position or signs. The trickiest moment comes around 43.3 miles in.
Driving Effort5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 269.9 miles you will encounter 13 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 43.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 111.5 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 112.2 miles (I 840 / Tennessee National Guard Parkway): Merge point - match speed before joining. Lane positioning matters here.
Critical Maneuvers
5 of 13 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
7
43.3 mi into trip|~1h 6m in
Take the exit toward Primary SR 22: Parkers Crossroad, Lexington, Huntingdon
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward Primary SR 22: Parkers Crossroad, Lexing...
5
111.5 mi into trip|~2h 20m in
Take the exit toward I 840 East: Knoxville, Franklin
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 840 East: Knoxville, Franklin
5
112.2 mi into trip|~2h 21m in|I 840 / Tennessee National Guard Parkway
Merge onto I 840 / Tennessee National Guard Parkway
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
7
164.4 mi into trip|~3h 17m in
Take the exit toward I 24 East: Chattanooga
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 53A
Toward I 24 East: Chattanooga
6
269.7 mi into trip|~5h 16m in|West Martin Luther King Boulevard
Turn right onto West Martin Luther King Boulevard
Lane positioning matters here
Use the left / straight / right lanes.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Greenfield, TN and Chattanooga, TN, road signs point toward Primary Sr 22: Parkers Crossroad, Lexington, Huntingdon and Franklin.
Primary Sr 22: Parkers Crossroad
43.3 mi in|~1h 6m
Lexington
43.3 mi in|~1h 6m
Huntingdon
43.3 mi in|~1h 6m
Franklin
111.5 mi in|~2h 20m
Main Roads
Road
Distance
Duration
I 24
103.1 mi
1h 54m
I 40
68 mi
1h 12m
Tennessee National Guard Parkway
52.2 mi
55m
TN 22
18.5 mi
24m
East Main Street
15.5 mi
27m
SR 22 Bypass
2.1 mi
3m
Lexington Street
1.9 mi
3m
Veterans Drive North
1.5 mi
2m
Longest stretch:
I 24
— 103.1 mi, about 1h 54m
Turn-by-Turn Driving Directions
Step-by-step road directions between Greenfield, TN and Chattanooga, TN.
1
Start on SR 124
16 mi·27 min·East Main Street
2
Continue on SR 124
0.9 mi·1 min·West Magnolia Avenue
3
Turn right onto SR 124
0.2 mi·19 sec·North Stonewall Street
4
Turn straight onto SR 124
1.3 mi·2 min·Cedar Street
5
Continue on SR 124
1.2 mi·2 min·Old McKenzie Road
6
Turn right onto TN 22
6.6 mi·7 min·TN 22
7
Continue on SR 22 Business
390 ft·9 sec·SR 22 Business
8
Turn right onto US 70A
1.5 mi·2 min·Veterans Drive North
9
Turn left onto SR 22 Bypass
2.1 mi·3 min·SR 22 Bypass
10
Turn right onto Lexington Street
1.9 mi·3 min·Lexington Street
11
Turn right onto TN 22
6.5 mi·8 min·TN 22
12
Continue on SR 22; SR 424
0.2 mi·21 sec·Lexington Clarksburg Road
13
Continue on TN 22
5.4 mi·7 min·TN 22
14
Take the exit
0.2 mi·25 sec
Toward Primary SR 22: Parkers Crossroad, Lexington, Huntingdon
15
Merge onto I 40
68 mi·1 hr 12 min·I 40
16
Take the exit
0.7 mi·1 min
Toward I 840 East: Knoxville, Franklin
17
Merge onto I 840
52 mi·55 min·Tennessee National Guard Parkway
Use the straight / slight right lanes.
18
Take the exit
0.8 mi·2 min
Exit 53AToward I 24 East: ChattanoogaUse the straight / slight right lanes.
19
Merge onto I 24
103 mi·1 hr 54 min·I 24
Use the straight / slight right lanes.
20
Take the exit
0.4 mi·46 sec
Exit 184BToward US 27 North: Downtown Chattanooga
21
Continue on US 27
0.7 mi·59 sec·US 27
22
Take the exit
0.2 mi·25 sec
Exit 1BToward Downtown
23
Turn right onto West Martin Luther King Boulevard
0.2 mi·29 sec·West Martin Luther King Boulevard
Use the left / straight / right lanes.
24
Arrive at destination
TN 8
Trip Plan
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 134.9 miles from Greenfield, TN, or about 2h 46m into the drive.
The longest continuous stretch on this route runs about 103.1 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 59 miles or 1h 23m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 134.9 miles or 2h 46m 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 21m
Traffic, exits, and arrival timing usually matter more near Chattanooga, TN than in the middle of the route.
Before You Leave
+
Open the route before leaving Greenfield, TN 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 Greenfield, TN
This is one driving day of about 269.9 miles and 5h 16m.
Your first comfortable stop window is around 59 miles from Greenfield, TN.
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 I 24 for about 103.1 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 134.9 mi from Greenfield, TN
· 2h 46m into the drive
The midpoint is around 134.9 miles from Greenfield, TN, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before I 24 if your tank is already low. That segment runs about 103.1 miles.
Arriving in Chattanooga, TN
The final approach into Chattanooga, TN usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Chattanooga, TN.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
National Parks Near This Route
Worth a detour if your schedule allows.
Stones River National Battlefield
National Battlefield
The Battle of Stones River began on the last day of 1862 and became one of the bloodiest conflicts of the Civil War. The battle produced important military and political gains for the Union, and it ch...
2 mi from route
~4 min detour
Free
near mile 167.5
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$42.20 one way
$84.39 round trip
$3.97/gal25.4 MPG avg94 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$46.33
$92.66
premium
$4.89
$51.94
$103.88
diesel
$5.61
$59.59
$119.18
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$42
Meals
$25–$50
Total
$67–$92
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 94.4 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $28 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
81
0
$28.34
$12.96
Efficient EV
67.5
0
$23.62
$10.80
EV Truck/SUV
108
1
$37.79
$17.27
Gas CO2
94 kg
EV CO2
32 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 Apr 15, 2026
Origin
Greenfield, TN
Afternoon
in Greenfield on Thursday
Local time
2:06 PM
CDT
Current temp
53°F
Unavailable
Live forecast
Destination
Chattanooga, TN
Afternoon
in Chattanooga on Thursday
Local time
3:06 PM
EDT
Current temp
75°F
Unavailable
Live forecast
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
1 hour later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
22 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 16m 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.
Frequently Asked Questions
The drive from Greenfield, TN to Chattanooga, TN covers 269.9 miles and takes about 5h 16m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 24, I 40, Tennessee National Guard Parkway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 134.9 miles from Greenfield, TN. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $42.20 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This drive requires moderate attention. Across 269.9 miles you will encounter 13 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
The main spots that need attention: at 43.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 111.5 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 112.2 miles (I 840 / Tennessee National Guard Parkway): Merge point - match speed before joining. Lane positioning matters here.
Between Greenfield, TN and Chattanooga, TN, road signs point toward Primary Sr 22: Parkers Crossroad, Lexington, Huntingdon and Franklin.
Yes. Nearby national parks include Stones River National Battlefield.
