How far is San Marcos, TX from Montopolis, TX?
The driving distance from San Marcos, TX to Montopolis, TX is about 34 miles (54.7 km), with a travel time of about 00h 36m by car.
- The straight-line flight distance is about 29 miles (46.7 km).
- For a round trip, plan for roughly 01h 12m 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 36m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
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.
Partly Sunny
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between San Marcos and Montopolis.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Marcos and Montopolis.
-
1
Start on North Guadalupe Street
23 m · 9 sec · North Guadalupe Street
-
2
Turn left onto East Hopkins Street
1.1 mi · 2 min · East Hopkins Street
-
3
Turn slight left
1141 ft · 49 sec
-
4
Turn straight onto North Interstate 35
3027 ft · 1 min · North Interstate 35
-
5
Take the ramp slight left toward I 35 North
1503 ft · 37 sec
-
6
Merge slight left onto Purple Heart Trail
28.1 mi · 31 min · Purple Heart Trail
-
7
Take the exit slight right toward 6th - 12th Streets
665 ft · 18 sec
-
8
Turn straight onto North Interstate 35
105 m · 11 sec · North Interstate 35
-
9
Turn right onto East 7th Street
2.8 mi · 5 min · East 7th Street
-
10
Turn straight onto Airport Boulevard
1279 ft · 20 sec · Airport Boulevard
-
11
Continue on Ed Bluestein Boulevard
552 ft · 9 sec · Ed Bluestein Boulevard
-
12
Take the ramp straight toward 183 Toll South: Lockhart
148 m · 12 sec
-
13
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between San Marcos and Montopolis.
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
28.1 mi · 00h 31m
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.
Partly Sunny leaving San Marcos and Mostly Cloudy near Montopolis.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Marcos to Montopolis?
The road trip is about 34 miles (54.7 km) and usually takes 00h 36m 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 16.9 miles from San Marcos and 17 miles from Montopolis.
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 5 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 7:18 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.53 one way or $9.07 round trip. Estimated CO2 is about 10.7 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around San Marcos and Mostly Cloudy near Montopolis.
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 San Marcos and Montopolis. Straight-line distance: 29.05 mi (46.75 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 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 |
End: 183 Toll (-97.690637, 30.243248)
Estimated Travel Time
Distance: 55 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 07m |
| 40 mph (64.37 km/h) | 00h 50m |
| 50 mph (80.47 km/h) | 00h 40m |
| 60 mph (96.56 km/h) | 00h 33m |
| 70 mph (112.65 km/h) | 00h 29m |
| 80 mph (129 km/h) | 00h 25m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $4.53 | $9.07 |
| Mid-grade | $4.25 | $5.10 | $10.20 |
| Premium | $4.59 | $5.51 | $11.02 |
| Diesel | $3.99 | $4.79 | $9.58 |
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 17, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.