How far is Glen Rose, TX from San Marcos, TX?
The driving distance from Glen Rose, TX to San Marcos, TX is about 191.1 miles (307.6 km), with a travel time of about 03h 41m by car.
- The straight-line flight distance is about 162.9 miles (262.1 km).
- For a round trip, plan for roughly 07h 23m 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 41m.
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 Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Driving Route Map
The map below follows the saved road route between Glen Rose and San Marcos.
Turn-by-Turn Driving Directions
Step-by-step road directions between Glen Rose and San Marcos.
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1
Start on East Elm Street
20 m · 10 sec · East Elm Street
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2
Turn left onto Southwest Barnard Street
664 ft · 13 sec · Southwest Barnard Street
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3
Turn right onto Hereford Street
1794 ft · 33 sec · Hereford Street
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4
Turn left onto Southwest Big Bend Trail
11.9 mi · 14 min · Southwest Big Bend Trail
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5
Turn slight left
13.6 mi · 20 min
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6
Turn right onto East 2nd Street
663 ft · 9 sec · East 2nd Street
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7
Continue on West 2nd Street
1010 ft · 21 sec · West 2nd Street
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8
Turn left onto North Walnut Street
2995 ft · 39 sec · North Walnut Street
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9
Turn straight onto North US Highway 281
19 mi · 20 min · North US Highway 281
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10
Continue on North Rice Street
2.3 mi · 3 min · North Rice Street
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11
Continue on South US Highway 281
43.1 mi · 49 min · South US Highway 281
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12
Continue on North Key Avenue
2.3 mi · 5 min · North Key Avenue
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13
Continue on South US Highway 183
35.3 mi · 38 min · South US Highway 183
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14
Continue straight
2151 ft · 30 sec
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15
Keep slight left to continue on 183A Toll Road
14.3 mi · 14 min · 183A Toll Road
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16
Continue straight
11.6 mi · 13 min
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17
Take the exit slight right toward I 35 South: San Antonio
2251 ft · 55 sec
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18
Merge slight left onto Purple Heart Trail
2.5 mi · 3 min · Purple Heart Trail
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19
Keep slight left to continue on Purple Heart Trail
31 mi · 35 min · Purple Heart Trail
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20
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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21
Turn straight onto North Interstate 35
3250 ft · 1 min · North Interstate 35
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22
Turn slight right
144 m · 17 sec
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23
Turn slight right onto East Hopkins Street
1.1 mi · 2 min · East Hopkins Street
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24
Turn right onto North LBJ Drive
64 m · 9 sec · North LBJ Drive
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25
Turn left
128 m · 36 sec
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26
At the end of the road, turn left onto North Guadalupe Street
43 m · 3 sec · North Guadalupe Street
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27
Arrive at your destination
0 m · 1 sec · North Guadalupe Street
Car Route Details
A richer read on the saved driving route between Glen Rose 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 US Highway 281
Continue on South US Highway 281
43.1 mi · 00h 49m
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 Glen Rose 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 Glen Rose to San Marcos?
The road trip is about 191.1 miles (307.6 km) and usually takes 03h 41m 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?
Lampasas is a useful midpoint, sitting about 95.8 miles from Glen Rose and 95.4 miles from San Marcos.
How much longer is the road route than the straight-line distance?
The direct path is about 162.9 miles (262.1 km), while the road route adds roughly 28.2 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 9:36 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $25.47 one way or $50.94 round trip. Estimated CO2 is about 59.9 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Glen Rose and Sunny near San Marcos.
Stop Ideas Near Lampasas
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 Lampasas.
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Flight Path Map
This map shows the direct air route between Glen Rose and San Marcos. Straight-line distance: 162.83 mi (262.05 km).
#1 Glen Rose
City in Somervell County, Texas, United States
| Population | 2,736 |
| Coordinates | 32.2345900, -97.7553100 |
| Altitude | 189 |
| 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: 308 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 22m |
| 40 mph (64.37 km/h) | 04h 46m |
| 50 mph (80.47 km/h) | 03h 49m |
| 60 mph (96.56 km/h) | 03h 11m |
| 70 mph (112.65 km/h) | 02h 43m |
| 80 mph (129 km/h) | 02h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $25.47 | $50.94 |
| Mid-grade | $4.25 | $28.66 | $57.32 |
| Premium | $4.59 | $30.94 | $61.89 |
| Diesel | $3.99 | $26.91 | $53.83 |
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 · Aug 24, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.