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Trip from Hamilton, OH to Saint Marys, OH

Last recalculated Apr 17, 2026

Drive Time

2h 5m

Distance

94.8 mi

153 km

Drive Score

8/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$15

one way

EV Charging

Unknown

Best Time to Leave

Save up to 27 min
4 AM
1h 57m ★
6 AM
2h 6m
8 AM
2h 24m
10 AM
2h 12m
12 PM
2h 10m
3 PM
2h 13m
5 PM
2h 23m
8 PM
2h 1m

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

Best Time Drive vs Fly
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Downtown Hamilton, OH, OH

Hamilton, OH

Wikimedia Commons

Downtown Saint Marys, OH, OH

Saint Marys, OH

Birgit Böllinger

Trip Overview

The drive from Hamilton, OH to Saint Marys, OH covers 94.8 miles and takes about 2h 5m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.

The route leans on US 127, East Market Street, Hamilton Eaton Road for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 74.3 miles on US 127. At current regular gas prices, budget about $14.71 one way before food or hotel costs.

Trip Pace

Same-day drive is realistic

A same-day return is realistic if you keep stops short.

Midpoint

47.4 miles from Hamilton, OH

A natural place for your longest stop of the day , about 1h 2m into the drive .

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 2h 5m. Total distance: 94.8 miles.

Family Friendly

Moderate complexity with 0 natural rest stops along the way.

Solo Traveler

2h 5m drive, comfortable solo distance.

First-Time Driver

Mostly highway driving (80%). Straightforward navigation.

Drive Character

This is a 2h 5m highway drive covering 94.8 miles, with most of the trip on US 127 and East Market Street. The longest continuous stretch is about 74.3 miles on US 127.

Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 14 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
US 127 is the longest continuous segment at about 74.3 miles.

How Hard Is This Drive?

This is a straightforward highway drive that stays mostly on US 127 and East Market Street. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.1 miles in near US 127 / North Martin Luther King Junior Boulevard.

Driving Effort 3/10

Easy - simple navigation with a manageable amount of wheel time

Balances navigation complexity with total wheel time.

This is a straightforward 2h 5m drive. You will face about 9 decision points, but nothing that requires special attention if you follow navigation.

Where does it get tricky?

The main spots that need attention: at 0.1 miles (US 127 / North Martin Luther King Junior Boulevard): Lane positioning matters here; at 10.3 miles (US 127): Roundabout - know your exit number before entering; at 92.7 miles (SR 29): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.

Critical Maneuvers

5 of 9 key points

These are the spots where you need to pay the most attention. Preview them before you drive.

6
0.1 mi into trip | ~0m in | US 127 / North Martin Luther King Junior Boulevard

Turn left onto US 127 / North Martin Luther King Junior Boulevard

Lane positioning matters here

Use the left lane.
5
10.3 mi into trip | ~14m in | US 127

Enter roundabout onto US 127

Roundabout - know your exit number before entering

6
92.7 mi into trip | ~2h 1m in | SR 29

Take the exit onto SR 29 toward US 33 West, SR 29 East: Fort Wayne Industries, Saint Marys

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

Exit 25 Toward US 33 West, SR 29 East: Fort Wayne Indus...
5
93.2 mi into trip | ~2h 2m in | SR 29

Keep slight right at fork onto SR 29

Highway fork - watch signs carefully

Exit 25
5
94.8 mi into trip | ~2h 5m in | SR 29; SR 66 / West Spring Street

Turn left onto SR 29; SR 66 / West Spring Street

Navigation decision point

Main Roads

Road Distance Duration
US 127 74.3 mi 1h 37m
East Market Street 8.1 mi 9m
Hamilton Eaton Road 6.7 mi 8m
SR 29 1.9 mi 3m
North 3rd Street 1.7 mi 1m
South Riverside Drive 1.2 mi 1m
North Martin Luther King Junior Boulevard 0.5 mi 1m
North Main Street 0.3 mi <1m
Longest stretch: US 127 — 74.3 mi, about 1h 37m

Turn-by-Turn Driving Directions

Step-by-step road directions between Hamilton, OH and Saint Marys, OH.

1

Start on SR 129; SR 177

0.1 mi · 35 sec · High Street
Use the straight lane.
2

Turn left onto US 127

0.5 mi · 1 min · North Martin Luther King Junior Boulevard
Use the left lane.
3

Continue on US 127

1.7 mi · 1 min · North 3rd Street
4

Continue on US 127

1.2 mi · 1 min · South Riverside Drive
5

Continue on US 127

6.7 mi · 8 min · Hamilton Eaton Road
6

Enter roundabout onto US 127

158 ft · 1 sec · US 127
7

Continue on US 127

74 mi · 1 hr 37 min · US 127
8

Turn right onto SR 29; SR 703

8.1 mi · 9 min · East Market Street
9

Take the exit onto SR 29

0.5 mi · 1 min · SR 29
Exit 25 Toward US 33 West, SR 29 East: Fort Wayne Industries, Saint Marys
10

Keep slight right at fork onto SR 29

1.4 mi · 2 min · SR 29
Exit 25
11

Turn right onto SR 29; SR 116

0.3 mi · 37 sec · North Main Street
12

Turn left onto SR 29; SR 66

245 ft · 8 sec · West Spring Street
13

Turn right onto South Front Street

105 ft · 4 sec · South Front Street
14

Arrive at destination

South Front Street

Trip Plan

Morning Departure

Leave by 9 AM and you'll arrive before lunch.

Evening Departure

Even a 4 PM departure gets you there before dark in summer.

You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 47.4 miles from Hamilton, OH, or about 1h 2m into the drive.
The longest continuous stretch on this route runs about 74.3 miles.

This is a comfortable same-day trip.

Departure

Before you leave

Start with fuel, water, and navigation already sorted so the first hour feels easy.

First stop

Around 21 miles or 28m in

Use this first pause for coffee, a restroom break, and a quick traffic check ahead.

Halfway reset

Around 47.4 miles or 1h 2m in

This is the best place for your longest stop, a real meal, and a full fuel check.

Final approach

Final hour starts around 1h 42m

Traffic, exits, and arrival timing usually matter more near Saint Marys, OH than in the middle of the route.

Before You Leave

+

Open the route before leaving Hamilton, OH so your first major turns are already loaded.

+

Leave with enough water and a charging cable within reach, not packed away.

+

Check your fuel range against the first long segment, especially if you are starting outside city service areas.

Day 1

Settle into the route from Hamilton, OH

This is one driving day of about 94.8 miles and 2h 5m.

Your first comfortable stop window is around 21 miles from Hamilton, OH.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on US 127 for about 74.3 miles.

Where to Stop

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

Halfway Point

Midpoint

About 47.4 mi from Hamilton, OH · 1h 2m into the drive

city in Darke County, Ohio, United States

Mid-route town

Meal stop

Greenville, OH

47 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

Eaton, OH

Fuel and coffee

A short stop after about 21 miles helps settle the day before fatigue starts building.

Greenville, OH

Meal break

The midpoint is around 47.4 miles from Hamilton, OH, which is a good place for a longer meal and fuel stop.

Before the longest stretch

Fuel check

Top up before US 127 if your tank is already low. That segment runs about 74.3 miles.

Arriving in Saint Marys, OH

The final approach into Saint Marys, OH usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.

Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Saint Marys, OH.

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

National Parks Near This Route

Worth a detour if your schedule allows.

Dayton Aviation Heritage National Historical Park

Dayton Aviation Heritage National Historical Park

National Historical Park

Dayton Aviation Heritage National Historical Park was established to honor the lives and achievements of poet and author Paul Laurence Dunbar and aviation pioneers Wilbur and Orville Wright. Through p...

28 mi from route ~70 min detour Free near mile 32.7
View on nps.gov

Park data from the National Park Service API. Alerts update every 2 hours.

Fuel & Cost

Regular Gas

$14.71 one way

$29.43 round trip

$3.94/gal 25.4 MPG avg 33 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.38 $16.33 $32.66
premium $4.91 $18.32 $36.64
diesel $5.61 $20.93 $41.86

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$15

Meals

$25–$50

Total

$40–$65

Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.

Estimated CO2 emission: 33.2 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $10 in charging · 0 stops · 67% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 28.4 0 $9.95 $4.55
Efficient EV 23.7 0 $8.30 $3.79
EV Truck/SUV 37.9 0 $13.27 $6.07

Gas CO2

33 kg

EV CO2

11 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 16, 2026

Origin

Hamilton, OH

Night in Hamilton on Thursday

Local time

11:55 PM

EDT

Current temp

78°F

Partly Sunny

W 14 mph 13% chance Live forecast

Destination

Saint Marys, OH

Night in Saint Marys on Thursday

Local time

11:55 PM

EDT

Current temp

52°F

Unavailable

Live forecast

52°F

Greenville, OH

47 mi in

Seasonal Notes

Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.

Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.

Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.

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

26 degrees cooler at arrival

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

Road read

2h 5m on the road

The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.

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

Frequently Asked Questions

The drive from Hamilton, OH to Saint Marys, OH covers 94.8 miles and takes about 2h 5m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are US 127, East Market Street, Hamilton Eaton Road. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 47.4 miles from Hamilton, OH. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $14.71 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This is a straightforward 2h 5m drive. You will face about 9 decision points, but nothing that requires special attention if you follow navigation.
The main spots that need attention: at 0.1 miles (US 127 / North Martin Luther King Junior Boulevard): Lane positioning matters here; at 10.3 miles (US 127): Roundabout - know your exit number before entering; at 92.7 miles (SR 29): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
The route from Hamilton, OH to Saint Marys, OH does not surface many named destination signs beyond the main corridor.
Yes. Nearby national parks include Dayton Aviation Heritage National Historical Park.

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