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Trip from Castle Point, MO to Byrnes Mill, MO

Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards

Drive Time

55m

Distance

34.8 mi

56 km

Drive Score

8/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$5

one way

EV Charging

Unknown

Best Time to Leave

Save up to 13 min
4 AM
0h 51m ★
6 AM
0h 55m
8 AM
1h 4m
10 AM
0h 58m
12 PM
0h 58m
3 PM
0h 59m
5 PM
1h 4m
8 PM
0h 53m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Downtown Castle Point, MO, MO

Castle Point, MO

Gergely Meszárcsek

Downtown Byrnes Mill, MO, MO

Byrnes Mill, MO

Valeria Boltneva

Trip Overview

If you are planning a trip from Castle Point to Byrnes Mill, you are looking at a straightforward 34.8-mile journey through the heart of Missouri. Expect to spend about 55 minutes behind the wheel, making this an ideal day trip that requires no overnight stay. You will navigate primarily via Chambers Road, Halls Ferry Road, and Jennings Station Road rather than relying on major interstates. With a fuel budget of just $5, this is an incredibly economical route to navigate. It serves as a practical connection within the Midwest, offering a simple transit between these two locations.

Main Roads

Road Distance Duration
MO 30 11.1 mi 14m
Police Officer Ernest M. Brockman Sr. Memorial Highway 3.5 mi 4m
Jennings Station Road 3.3 mi 6m
North Skinker Boulevard 2.8 mi 5m
Police Officer Robert Stanze Memorial Highway 2.7 mi 3m
Halls Ferry Road 1.6 mi 2m
McCausland Avenue 1.6 mi 2m
Kienlen Avenue 1.6 mi 2m
Longest stretch: MO 30 — 11.1 mi, about 14m

Turn-by-Turn Driving Directions

Step-by-step road directions between Castle Point, MO and Byrnes Mill, MO.

1

Start on Lord Drive

0.5 mi · 1 min · Lord Drive
2

At end of road, turn right onto Chambers Road

0.4 mi · 39 sec · Chambers Road
3

Turn left onto MO AC

1.6 mi · 2 min · Halls Ferry Road
4

Turn right onto Jennings Station Road

3.3 mi · 6 min · Jennings Station Road
5

Continue on Kienlen Avenue

1.6 mi · 2 min · Kienlen Avenue
6

Continue on North Skinker Boulevard

2.8 mi · 5 min · North Skinker Boulevard
7

Continue on McCausland Avenue

1.6 mi · 2 min · McCausland Avenue
8

Turn left onto Arsenal Street

0.2 mi · 39 sec · Arsenal Street
9

Turn right onto Jamieson Avenue

0.1 mi · 15 sec · Jamieson Avenue
10

Take the ramp

0.2 mi · 14 sec
Toward I 44 West Use the right lane.
11

Merge onto I 44

0.7 mi · 54 sec · Officer Michael Barwick Memorial Highway
12

Continue on I 44

2.7 mi · 3 min · Police Officer Robert Stanze Memorial Highway
13

Continue on I 44

3.5 mi · 4 min · Police Officer Ernest M. Brockman Sr. Memorial Highway
14

Take the exit

0.4 mi · 46 sec
Exit 276 Toward I 270: Memphis, Chicago Use the slight right lane.
15

Keep slight right at fork

0.1 mi · 15 sec
Toward I 270: Memphis, Chicago Use the straight lane.
16

Keep slight left at fork

0.6 mi · 1 min
Toward I 270 South: Memphis Use the slight left lane.
17

Merge onto I 270

1.5 mi · 1 min · I 270
18

Take the exit

0.3 mi · 33 sec
Exit 3 Toward MO 30: Gravois Road Use the slight right lane.
19

Keep slight right at fork

306 ft · 7 sec
Toward MO 30 West: Fenton Use the right lane.
20

Merge onto MO 30

11 mi · 14 min · MO 30
Use the straight lane.
21

Take the exit

109 ft · 3 sec
Toward Upper Byrnes Mill Road
22

Turn slight right onto Upper Byrnes Mill Road

1.4 mi · 3 min · Upper Byrnes Mill Road
23

Arrive at destination

Upper Byrnes Mill Road

Where to Stop

Rest stops, refuel points, and overnight suggestions along this route.

Unincorporated community in Missouri, U.S.

Mid-route town

Meal stop

Affton, MO

17 mi into the route

Best for: Lunch, fuel, and a longer reset

This sits close to the middle of the route, so it works well for the longest stop of the day.

Pacing Suggestions

High Ridge, MO

Fuel and coffee

A short stop after about 34.8 miles helps settle the day before fatigue starts building.

Kirkwood, MO

Meal break

The midpoint is around 17.4 miles from Castle Point, MO, which is a good place for a longer meal and fuel stop.

These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.

Heads-up: tricky spots

5 of 14

5 decision points cluster between mile 19.3 and 22.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.

8
19.3 mi into trip | ~32m in

Take the exit toward I 270: Memphis, Chicago

Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one

Use the slight right lane. Exit 276 Toward I 270: Memphis, Chicago
8
19.7 mi into trip | ~32m in

Keep slight right at fork toward I 270: Memphis, Chicago

Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one

Use the straight lane. Toward I 270: Memphis, Chicago
7
19.8 mi into trip | ~33m in

Keep slight left at fork toward I 270 South: Memphis

Highway fork - watch signs carefully. Lane positioning matters here

Use the slight left lane. Toward I 270 South: Memphis
7
21.9 mi into trip | ~36m in

Take the exit toward MO 30: Gravois Road

Exit ramp - move to the correct lane early. Lane positioning matters here

Use the slight right lane. Exit 3 Toward MO 30: Gravois Road
8
22.2 mi into trip | ~36m in

Keep slight right at fork toward MO 30 West: Fenton

Highway fork - watch signs carefully. Lane positioning matters here

Use the right lane. Toward MO 30 West: Fenton

Fuel & Cost

Regular Gas

$5.44 one way

$10.88 round trip

$3.97/gal 25.4 MPG avg 12 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.36 $5.97 $11.95
premium $4.89 $6.70 $13.39
diesel $5.61 $7.68 $15.37

No toll roads detected on this route.

Drive Cost (one way)

Fuel

$5

Estimated CO2 emission: 12.2 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $4 in charging · 0 stops · 67% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 10.4 0 $3.65 $1.67
Efficient EV 8.7 0 $3.04 $1.39
EV Truck/SUV 13.9 0 $4.87 $2.23

Gas CO2

12 kg

EV CO2

4 kg (67% less)

This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.

DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.

Travel Intel

Current conditions at both ends of the drive.

Forecast as of Apr 15, 2026

Origin

Castle Point, MO

Late night in Castle Point on Sunday

Local time

2:46 AM

CDT

Current temp

58°F

Unavailable

Live forecast

Destination

Byrnes Mill, MO

Late night in Byrnes Mill on Sunday

Local time

2:46 AM

CDT

Current temp

61°F

Unavailable

Live forecast

Time zone

Same local time

Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.

Temperature spread

3 degrees warmer at arrival

A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.

Road read

55m on the road

Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.

Weather data from the National Weather Service. Conditions may change; check closer to your travel date.

What kind of drive is this?

This 34.8-mile trek is defined by its turn-heavy local road profile, meaning you should stay alert as you navigate through the area. Because the highway share is 0%, you won't experience the monotony of high-speed interstate cruising; instead, you will be managing consistent turns on local surface streets. The road environment remains steady throughout the 55-minute duration, lacking any long, uninterrupted stretches of highway. Expect a hands-on driving experience where the pace is dictated by local infrastructure rather than open-road speed limits. It is a technical, localized drive that requires your full attention on the road ahead.

36% highway, the rest on surface roads — varied driving throughout.
23 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 11.1 mi on MO 30.

How Hard Is This Drive?

10/10

This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 19.3 miles in.

Driving Effort 10/10

Focused - lots of decisions in a short distance, but it is over quickly

Balances navigation complexity with total wheel time.

This is a short but busy drive. With 14 decision points packed into just 34.8 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 55m.

Where does it get tricky?

The main spots that need attention: at 19.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 19.7 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 19.8 miles: Highway fork - watch signs carefully. Lane positioning matters here.

Towns Mentioned on Route Signs

Based on OSRM destination-sign hints, not a full list of every settlement the road passes.

On the drive from Castle Point, MO to Byrnes Mill, MO, road signs begin pointing toward Chicago along the way.

Chicago

19.3 mi in | ~32m

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 55m. Total distance: 34.8 miles.

Family Friendly

Moderate complexity with 0 natural rest stops along the way.

Solo Traveler

55m drive, comfortable solo distance.

EV Driver

0 DC fast chargers along the route. Coverage: unknown.

First-Time Driver

Mostly highway driving (36%). Some complex stretches to watch for.

Scenic Drive

Mixed highway & surface route profile.

Frequently Asked Questions

The longest stretch is about 11.1 miles on MO 30. The full list of main roads is in the Roads section above.

It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Byrnes Mill, MO before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.

Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.

The main spots that need attention: at 19.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 19.7 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 19.8 miles: Highway fork - watch signs carefully. Lane positioning matters here.

Yes. A round trip is manageable in a single day if you plan a break at Byrnes Mill, MO before heading back.

How this page is built

Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and EIA for fuel prices. See our methodology for refresh cadence and limitations.

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