How far is Montopolis, TX from San Marcos, TX?
The driving distance from Montopolis, TX to San Marcos, TX is about 32.4 miles (52.2 km), with a travel time of about 00h 39m by car.
- The straight-line flight distance is about 29 miles (46.7 km).
- For a round trip, plan for roughly 01h 18m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM CDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 00h 39m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
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 Hays County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy
Partly Sunny
Driving Route Map
The map below follows the saved road route between Montopolis and San Marcos.
Turn-by-Turn Driving Directions
Step-by-step road directions between Montopolis and San Marcos.
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1
Start on 183 Toll South: Lockhart
67 m · 5 sec
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2
Merge slight left onto Bergstrom Expressway
1.3 km · 47 sec · Bergstrom Expressway
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3
Continue on Bastrop Highway
1084 ft · 14 sec · Bastrop Highway
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4
Take the exit slight left toward 183 Toll: Ben White Boulevard
1 mi · 2 min
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5
Merge slight right
3.1 mi · 3 min
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6
Take the exit slight right toward I 35 South, I 35 North, US 290 East: San Antonio, Waco
2116 ft · 52 sec
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7
Keep slight left to continue on I 35 South: San Antonio
1.5 km · 2 min
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8
Merge slight left onto Purple Heart Trail
23.8 mi · 26 min · Purple Heart Trail
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9
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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10
Turn straight onto North Interstate 35
3250 ft · 1 min · North Interstate 35
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11
Turn slight right
144 m · 17 sec
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12
Turn slight right onto East Hopkins Street
1.1 mi · 2 min · East Hopkins Street
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13
Turn right onto North LBJ Drive
64 m · 9 sec · North LBJ Drive
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14
Turn left
128 m · 36 sec
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15
At the end of the road, turn left onto North Guadalupe Street
43 m · 3 sec · North Guadalupe Street
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16
Arrive at your destination
0 m · 1 sec · North Guadalupe Street
Car Route Details
A richer read on the saved driving route between Montopolis and San Marcos.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Purple Heart Trail
Merge slight left onto Purple Heart Trail
23.8 mi · 00h 26m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Mostly Cloudy leaving Montopolis and Partly Sunny near San Marcos.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Montopolis to San Marcos?
The road trip is about 32.4 miles (52.2 km) and usually takes 00h 39m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Buda is a useful midpoint, sitting about 16.3 miles from Montopolis and 16.2 miles from San Marcos.
How much longer is the road route than the straight-line distance?
The direct path is about 29 miles (46.7 km), while the road route adds roughly 3.4 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 7:00 AM to 7:00 PM CDT. If you want a more comfortable same-day return, try to leave by 7:12 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.35 one way or $8.69 round trip. Estimated CO2 is about 10.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Montopolis and Partly Sunny near San Marcos.
Stop Ideas Near Buda
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 Buda.
Austin
San Marcos Station
Taylor
San Antonio Station
Flight Path Map
This map shows the direct air route between Montopolis and San Marcos. Straight-line distance: 29.05 mi (46.75 km).
#1 Montopolis
This Travis County community, situated at an elevation of 469 feet, is known for its Colorado River industrial areas.
| Population | 912,791 |
| Coordinates | 30.2432700, -97.6905600 |
| Altitude | 143 |
| 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: 52 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 04m |
| 40 mph (64.37 km/h) | 00h 48m |
| 50 mph (80.47 km/h) | 00h 38m |
| 60 mph (96.56 km/h) | 00h 32m |
| 70 mph (112.65 km/h) | 00h 27m |
| 80 mph (129 km/h) | 00h 24m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $4.35 | $8.69 |
| Mid-grade | $4.25 | $4.89 | $9.78 |
| Premium | $4.59 | $5.28 | $10.56 |
| Diesel | $3.99 | $4.59 | $9.18 |
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 · Apr 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.