How far is San Marcos, TX from Glen Rose, TX?
The driving distance from San Marcos, TX to Glen Rose, TX is about 191.2 miles (307.7 km), with a travel time of about 03h 42m by car.
- The straight-line flight distance is about 162.9 miles (262.1 km).
- For a round trip, plan for roughly 07h 24m 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 42m.
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 San Marcos and Glen Rose.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Marcos and Glen Rose.
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1
Start on North Guadalupe Street
23 m · 9 sec · North Guadalupe Street
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2
Turn left onto East Hopkins Street
1.1 mi · 2 min · East Hopkins Street
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3
Turn slight left
1141 ft · 49 sec
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4
Turn straight onto North Interstate 35
3027 ft · 1 min · North Interstate 35
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5
Take the ramp slight left toward I 35 North
1503 ft · 37 sec
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6
Merge slight left onto Purple Heart Trail
29.1 mi · 32 min · Purple Heart Trail
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7
Keep slight right to continue on Purple Heart Trail
4 mi · 5 min · Purple Heart Trail
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8
Take the exit slight right toward US 183 North: Lampasas
1.4 km · 2 min
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9
Merge slight left
11.3 mi · 13 min
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10
Continue straight
14.6 mi · 15 min
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11
Continue on North US Highway 183
35.7 mi · 39 min · North US Highway 183
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12
Continue on South Key Avenue
2.3 mi · 5 min · South Key Avenue
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13
Continue on North US Highway 281
965 ft · 15 sec · North US Highway 281
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14
Keep slight right to continue on North US Highway 281
42.9 mi · 49 min · North US Highway 281
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15
Continue on South Rice Street
2.3 mi · 3 min · South Rice Street
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16
Continue on North US Highway 281
19 mi · 20 min · North US Highway 281
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17
Continue on South Walnut Street
2995 ft · 44 sec · South Walnut Street
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18
At the end of the road, turn right onto West 2nd Street
973 ft · 13 sec · West 2nd Street
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19
Continue on East 2nd Street
701 ft · 15 sec · East 2nd Street
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20
Turn left onto North Cedar Street
1.3 km · 1 min · North Cedar Street
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21
Continue on State Highway 220
12.8 mi · 19 min · State Highway 220
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22
Merge slight left onto US Highway 67
11.9 mi · 14 min · US Highway 67
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23
Turn right onto Hereford Street
1794 ft · 36 sec · Hereford Street
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24
Turn left onto Southwest Barnard Street
664 ft · 17 sec · Southwest Barnard Street
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25
Turn right onto East Elm Street
20 m · 1 sec · East Elm Street
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26
Arrive at your destination
0 m · 1 sec · East Elm Street
Car Route Details
A richer read on the saved driving route between San Marcos and Glen Rose.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
North US Highway 281
Keep slight right to continue on North US Highway 281
42.9 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 San Marcos and Sunny near Glen Rose.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Marcos to Glen Rose?
The road trip is about 191.2 miles (307.7 km) and usually takes 03h 42m 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 San Marcos and 95.4 miles from Glen Rose.
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 28.3 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 9:36 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $25.51 one way or $51.02 round trip. Estimated CO2 is about 60 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around San Marcos and Sunny near Glen Rose.
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 San Marcos and Glen Rose. Straight-line distance: 162.83 mi (262.05 km).
#1 San Marcos
The most populous city in Hays County, Texas.
| Population | 66,350 |
| Coordinates | 29.8832700, -97.9413900 |
| Altitude | 188 |
| Country | United States |
#2 Glen Rose
City in Somervell County, Texas, United States
| Population | 2,736 |
| Coordinates | 32.2345900, -97.7553100 |
| Altitude | 189 |
| Country | United States |
End: Glen Rose (-97.75531, 32.23459)
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 | $25.51 | $51.02 |
| Mid-grade | $4.25 | $28.70 | $57.40 |
| Premium | $4.59 | $30.99 | $61.98 |
| Diesel | $3.99 | $26.95 | $53.91 |
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.