How far is Fort Worth, TX from San Marcos, TX?
The driving distance from Fort Worth, TX to San Marcos, TX is about 216.1 miles (347.7 km), with a travel time of about 03h 50m by car.
- The straight-line flight distance is about 199.8 miles (321.5 km).
- For a round trip, plan for roughly 07h 40m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 03h 50m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 Bell County, Texas
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Fort Worth and San Marcos.
Turn-by-Turn Driving Directions
Step-by-step road directions between Fort Worth and San Marcos.
-
1
Start on South Freeway
53 m · 4 sec · South Freeway
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2
Take the ramp slight left toward I 35W South
1365 ft · 33 sec
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3
Merge slight left onto South Freeway
82.3 mi · 1 hr 25 min · South Freeway
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4
Continue on North Jack Kultgen Expressway
6.6 mi · 8 min · North Jack Kultgen Expressway
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5
Continue on Purple Heart Trail
37.9 mi · 39 min · Purple Heart Trail
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6
Keep slight left
55.8 mi · 59 min
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7
Keep slight left to continue on Purple Heart Trail
31 mi · 35 min · Purple Heart Trail
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8
Take the exit slight right toward TX 80 East, TX 142 East, TX 21 East: Bastrop, Luling
1079 ft · 26 sec
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9
Turn straight onto North Interstate 35
3250 ft · 1 min · North Interstate 35
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10
Turn slight right
144 m · 17 sec
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11
Turn slight right onto East Hopkins Street
1.1 mi · 2 min · East Hopkins Street
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12
Turn right onto North LBJ Drive
64 m · 9 sec · North LBJ Drive
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13
Turn left
128 m · 36 sec
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14
At the end of the road, turn left onto North Guadalupe Street
43 m · 3 sec · North Guadalupe Street
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15
Arrive at your destination
0 m · 1 sec · North Guadalupe Street
Car Route Details
A richer read on the saved driving route between Fort Worth and San Marcos.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
South Freeway
Merge slight left onto South Freeway
82.3 mi · 01h 25m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Fort Worth and Sunny near San Marcos.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Fort Worth to San Marcos?
The road trip is about 216.1 miles (347.7 km) and usually takes 03h 50m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Troy is a useful midpoint, sitting about 108.2 miles from Fort Worth and 107.8 miles from San Marcos.
How much longer is the road route than the straight-line distance?
The direct path is about 199.8 miles (321.5 km), while the road route adds roughly 16.3 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 9:20 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.80 one way or $57.59 round trip. Estimated CO2 is about 67.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Fort Worth and Sunny near San Marcos.
Stop Ideas Near Troy
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 Troy.
Temple
McGregor
Killeen, Texas
Waco, TX
Flight Path Map
This map shows the direct air route between Fort Worth and San Marcos. Straight-line distance: 199.76 mi (321.48 km).
#1 Fort Worth
The twelfth most populous city in the United States and the center of the Dallas-Fort Worth metropolitan area.
| Population | 927,720 |
| Coordinates | 32.7254100, -97.3208500 |
| Altitude | 199 |
| Country | United States |
#2 San Marcos
The most populous city in Hays County, Texas.
| Population | 66,350 |
| Coordinates | 29.8832700, -97.9413900 |
| Altitude | 188 |
| Country | United States |
End: San Marcos (-97.94139, 29.88327)
Estimated Travel Time
Distance: 348 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 11m |
| 40 mph (64.37 km/h) | 05h 24m |
| 50 mph (80.47 km/h) | 04h 19m |
| 60 mph (96.56 km/h) | 03h 36m |
| 70 mph (112.65 km/h) | 03h 05m |
| 80 mph (129 km/h) | 02h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $28.80 | $57.59 |
| Mid-grade | $4.25 | $32.40 | $64.80 |
| Premium | $4.59 | $34.98 | $69.97 |
| Diesel | $3.99 | $30.43 | $60.85 |
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 Texas · Jun 02, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.