How far is Waco, TX from San Marcos, TX?
The driving distance from Waco, TX to San Marcos, TX is about 131.2 miles (211.2 km), with a travel time of about 02h 24m by car.
- The straight-line flight distance is about 124.4 miles (200.2 km).
- For a round trip, plan for roughly 04h 49m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 24m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Census designated place
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Waco and San Marcos.
Turn-by-Turn Driving Directions
Step-by-step road directions between Waco and San Marcos.
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1
Start on West Waco Drive
110 m · 15 sec · West Waco Drive
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2
Continue on West Waco Drive
525 ft · 26 sec · West Waco Drive
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3
Turn left onto North 18th Street
1.4 mi · 4 min · North 18th Street
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4
Turn right onto South Jack Kultgen Expressway
60 m · 4 sec · South Jack Kultgen Expressway
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5
Take the ramp straight toward I 35 South
1605 ft · 39 sec
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6
Merge slight left onto South Jack Kultgen Expressway
2.5 mi · 3 min · South Jack Kultgen Expressway
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7
Continue on Purple Heart Trail
37.9 mi · 39 min · Purple Heart Trail
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8
Keep slight left
55.8 mi · 59 min
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9
Keep slight left to continue on Purple Heart Trail
31 mi · 35 min · Purple Heart Trail
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10
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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11
Turn straight onto North Interstate 35
3250 ft · 1 min · North Interstate 35
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12
Turn slight right
144 m · 17 sec
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13
Turn slight right onto East Hopkins Street
1.1 mi · 2 min · East Hopkins Street
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14
Turn right onto North LBJ Drive
64 m · 9 sec · North LBJ Drive
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15
Turn left
128 m · 36 sec
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16
At the end of the road, turn left onto North Guadalupe Street
43 m · 3 sec · North Guadalupe Street
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17
Arrive at your destination
0 m · 1 sec · North Guadalupe Street
Car Route Details
A richer read on the saved driving route between Waco 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.
Purple Heart Trail
Keep slight left
55.8 mi · 00h 59m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving Waco 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 Waco to San Marcos?
The road trip is about 131.2 miles (211.2 km) and usually takes 02h 24m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Serenada is a useful midpoint, sitting about 65.7 miles from Waco and 65.5 miles from San Marcos.
How much longer is the road route than the straight-line distance?
The direct path is about 124.4 miles (200.2 km), while the road route adds roughly 6.8 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 1:40 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $17.77 one way or $35.55 round trip. Estimated CO2 is about 41.1 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Waco and Sunny near San Marcos.
Stop Ideas Near Serenada
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 Serenada.
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Austin
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Flight Path Map
This map shows the direct air route between Waco and San Marcos. Straight-line distance: 124.42 mi (200.23 km).
#1 Waco
The 11th most populous city in Texas.
| Population | 141,377 |
| Coordinates | 31.5493300, -97.1466700 |
| 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: 211 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 22m |
| 40 mph (64.37 km/h) | 03h 16m |
| 50 mph (80.47 km/h) | 02h 37m |
| 60 mph (96.56 km/h) | 02h 11m |
| 70 mph (112.65 km/h) | 01h 52m |
| 80 mph (129 km/h) | 01h 38m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.84 | $17.77 | $35.55 |
| Mid-grade | $4.35 | $20.13 | $40.25 |
| Premium | $4.72 | $21.87 | $43.73 |
| Diesel | $5.78 | $26.74 | $53.49 |
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 · Oct 15, 2026