How far is Castle Point, MO from Marthasville, MO?
The driving distance from Castle Point, MO to Marthasville, MO is about 55.3 miles (89 km), with a travel time of about 01h 20m by car.
- The straight-line flight distance is about 44.6 miles (71.7 km).
- For a round trip, plan for roughly 02h 41m 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 01h 20m.
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.
City in Saint Charles County, Missouri, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Castle Point and Marthasville.
Turn-by-Turn Driving Directions
Step-by-step road directions between Castle Point and Marthasville.
-
1
Start on Lord Drive
87 m · 15 sec · Lord Drive
-
2
Turn right onto Duchess Drive
1166 ft · 53 sec · Duchess Drive
-
3
Turn right onto Edgefield Drive
1370 ft · 1 min · Edgefield Drive
-
4
Turn left onto Hudson Drive
1352 ft · 1 min · Hudson Drive
-
5
At the end of the road, turn right onto Halls Ferry Road
1766 ft · 30 sec · Halls Ferry Road
-
6
Keep slight left to continue on New Halls Ferry Road
1.1 km · 1 min · New Halls Ferry Road
-
7
Turn left onto Dunn Road
1913 ft · 53 sec · Dunn Road
-
8
Take the ramp straight toward I 270 West
1385 ft · 34 sec
-
9
Merge slight left onto Rosemary Straub Davison Highway
8.6 mi · 11 min · Rosemary Straub Davison Highway
-
10
Take the exit slight right toward I 70: Saint Louis, Kansas City
1492 ft · 26 sec
-
11
Continue on I 70: Saint Louis, Kansas City
2478 ft · 43 sec
-
12
Keep slight right to continue on I 70 West: Kansas City
2439 ft · 42 sec
-
13
Merge slight left
3.3 mi · 4 min
-
14
Take the exit slight right
657 ft · 16 sec
-
15
Turn straight onto North Outer Road
1263 ft · 24 sec · North Outer Road
-
16
Continue on North Outer Road
1566 ft · 30 sec · North Outer Road
-
17
Keep slight left to continue on MO 94 West: Veterans Memorial Parkway
631 ft · 16 sec
-
18
Continue on South First Capitol Drive
7.3 mi · 10 min · South First Capitol Drive
-
19
Take the exit slight right toward MO 94 West: Weldon Spring
3.8 mi · 6 min
-
20
Keep slight left
1.3 mi · 2 min
-
21
Turn right
15.3 mi · 22 min
-
22
At the end of the road, turn left
3.1 mi · 4 min
-
23
Continue straight
3.6 mi · 6 min
-
24
Continue straight
1.1 km · 2 min
-
25
At the end of the road, turn right
3.4 mi · 5 min
-
26
Turn right onto One Street
1966 ft · 56 sec · One Street
-
27
At the end of the road, turn right onto East Main Street
758 ft · 23 sec · East Main Street
-
28
Turn right onto South 2nd Street
38 m · 5 sec · South 2nd Street
-
29
Arrive at your destination
0 m · 1 sec · South 2nd Street
Car Route Details
A richer read on the saved driving route between Castle Point and Marthasville.
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.
Longest stretch
Turn right
15.3 mi · 00h 22m
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.
Mostly Sunny leaving Castle Point and Mostly Sunny near Marthasville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Castle Point to Marthasville?
The road trip is about 55.3 miles (89 km) and usually takes 01h 20m 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?
Weldon Spring is a useful midpoint, sitting about 27.6 miles from Castle Point and 27.7 miles from Marthasville.
How much longer is the road route than the straight-line distance?
The direct path is about 44.6 miles (71.7 km), while the road route adds roughly 10.7 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 3:48 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.35 one way or $14.71 round trip. Estimated CO2 is about 17.3 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Castle Point and Mostly Sunny near Marthasville.
Stop Ideas Near Weldon Spring
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall Park
City of O'Fallon
Swingley Ridge @ Chesterfield City Hall SB
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Weldon Spring.
Kirkwood
Washington
Gateway Transportation Center
Alton
Flight Path Map
This map shows the direct air route between Castle Point and Marthasville. Straight-line distance: 44.56 mi (71.72 km).
#1 Castle Point
A census-designated place in Jefferson County, Missouri.
| Population | 90,070 |
| Coordinates | 38.7581100, -90.2481700 |
| Altitude | 152 |
| Country | United States |
#2 Marthasville
City in Missouri
| Population | 1,198 |
| Coordinates | 38.6283800, -91.0576400 |
| Altitude | 171 |
| Country | United States |
End: Marthasville (-91.05764, 38.62838)
Estimated Travel Time
Distance: 89 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 50m |
| 40 mph (64.37 km/h) | 01h 22m |
| 50 mph (80.47 km/h) | 01h 06m |
| 60 mph (96.56 km/h) | 00h 55m |
| 70 mph (112.65 km/h) | 00h 47m |
| 80 mph (129 km/h) | 00h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $7.35 | $14.71 |
| Mid-grade | $4.25 | $8.29 | $16.59 |
| Premium | $4.65 | $9.08 | $18.15 |
| Diesel | $5.30 | $10.34 | $20.69 |
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 Missouri · Apr 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.