Heard Natural Science Museum & Wildlife Sanctuary
Near the start, short detour
McKinney, Texas
Hours: 9 am–4 pm
+19725625566
Visit websiteCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Jul 20, 2026 · Editorial standards
Drive Time
4h 34m
Distance
253.5 mi
408 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$35
one way
EV Charging
Unknown
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
McKinney, TX
Wikimedia Commons
Tomball, TX
Danny Meneses
McKinney, TX to Tomball, TX is 253.5 miles and takes about 4h 34m via Julius Schepps Freeway, with a fuel budget near $37 and enough daylight to finish in a day. This trip stays within the Great Plains region, primarily traversing Texas. Expect a straightforward drive that's almost entirely highway, making it a convenient option for a quick relocation or a visit to a nearby city. With a recommended single day of travel, you can easily complete this route without needing an overnight stay, saving you time and accommodation costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
126.7 miles from McKinney, TX
A natural place for your longest stop of the day , about 2h 14m into the drive .
| Road | Distance | Duration |
|---|---|---|
| Julius Schepps Freeway | 204.4 mi | 3h 30m |
| Central Expressway | 29.2 mi | 31m |
| FM 2978 Road | 7.9 mi | 12m |
| FM 1488 | 6.5 mi | 9m |
| East Virginia Street | 1.4 mi | 3m |
| East Main Street | 1.4 mi | 3m |
| Hufsmith Kohrville Road | 1.3 mi | 1m |
| South Central Expressway | 0.6 mi | <1m |
Hour-of-day weekday pattern from 36 FHWA count stations on your route.
Peak
4 PM
~1,927 veh/hr typical · worst 2,389
Quietest
2 AM
~288 veh/hr
Peak-to-quiet ratio
6.7×
busier at peak than in the quiet hours
Averaged across 45 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Step-by-step road directions between McKinney, TX and Tomball, TX.
Start on North Tennessee Street
Turn left onto East Virginia Street
Turn left onto South Central Expressway
Take the ramp
Merge onto US 75; TX 121
Continue on I 45
Keep slight left at fork onto I 45
Take the exit
Turn straight onto Interstate 45 North Frontage Road
Turn slight right
Turn straight onto FM 1488
Turn left onto FM 2978
Continue on FM 2978
Turn right onto FM 2920
Arrive at destination
Given the 4h 34m estimated drive time, departing McKinney, TX in the morning will allow you to reach Tomball, TX well before evening. The route is efficient, with only one recommended stop, so you can be flexible with your timing. Keep an eye on your fuel levels, especially during the long 204.4-mile stretch on Julius Schepps Freeway, as services might be less frequent. The $37 fuel cost estimate is helpful for budgeting, and since it's a single-day trip, you won't need to factor in overnight expenses.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
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 56 miles or 1h 1m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 126.7 miles or 2h 14m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 37m
Traffic, exits, and arrival timing usually matter more near Tomball, TX than in the middle of the route.
Open the route before leaving McKinney, TX 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 McKinney, TX
This is one driving day of about 253.5 miles and 4h 34m.
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
127 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.
A short stop after about 56 miles helps settle the day before fatigue starts building.
The midpoint is around 126.7 miles from McKinney, TX, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before Julius Schepps Freeway if your tank is already low. That segment runs about 204.4 miles.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Picked by where they fit in your drive — first break, midpoint reset, final stretch.
Near the start, short detour
McKinney, Texas
Hours: 9 am–4 pm
+19725625566
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Plano, Texas
+14692980556
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Dallas, Texas
Hours: 10 am–5 pm
+19724823055
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Plano, Texas
Hours: 12–5:30 pm
+14692095978
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Plano, Texas
Hours: Closed
+19728810140
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Conroe, Texas
Hours: 6 am–8:30 pm
+19365223000
Visit websiteNear the end, ~12 min detour
Conroe, Texas
Hours: 9 am–11 pm
+19365223804
Visit websitePlace data sourced from public business listings. Hours and availability may vary.
5 decision points cluster between mile 2 and 242.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
Take the ramp toward US 75 South, TX 121 South
Lane positioning matters here. Multiple destination signs - pick the right one
Merge onto US 75; TX 121 / Central Expressway
Merge point - match speed before joining. Lane positioning matters here
Keep slight left at fork onto I 45 / Julius Schepps Freeway
Highway fork - watch signs carefully. Lane positioning matters here
Take the exit toward FM 1488: Magnolia, Hempstead
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Turn left onto FM 2978 / FM 2978 Road
Lane positioning matters here
Regular Gas
$34.72 one way
$69.44 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $3.89 | $38.78 | $77.57 |
| premium | $4.23 | $42.17 | $84.33 |
| diesel | $4.80 | $47.87 | $95.73 |
Estimated Tolls: $2.38
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$35
Tolls
$2
Meals
$25–$50
Total
$62–$87
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 88.7 kg one way. Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $27 in charging · 0 stops · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 76.1 | 0 | $26.62 | $12.17 |
| Efficient EV | 63.4 | 0 | $22.18 | $10.14 |
| EV Truck/SUV | 101.4 | 1 | $35.49 | $16.22 |
Gas CO2
89 kg
EV CO2
30 kg (66% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Current conditions at both ends of the drive.
Origin
Late night in McKinney on Monday
Local time
1:22 AM
CDT
Current temp
76°F
Partly Cloudy
Flood Warning
Flood Warning issued July 18 at 4:38AM CDT until July 19 at 6:46PM CDT by NWS Austin/San Antonio TX
Flood Warning
Flood Warning issued July 18 at 4:37AM CDT until July 20 at 12:00AM CDT by NWS Austin/San Antonio TX
Destination
Late night in Tomball on Monday
Local time
1:22 AM
CDT
Current temp
76°F
Mostly Cloudy
Flood Warning
Flood Warning issued July 18 at 4:38AM CDT until July 19 at 6:46PM CDT by NWS Austin/San Antonio TX
Flood Warning
Flood Warning issued July 18 at 4:37AM CDT until July 20 at 12:00AM CDT by NWS Austin/San Antonio TX
100°F
Italy, TX
127 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
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
Both ends of the route are sitting at about the same temperature right now.
Road read
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
This drive is predominantly highway, with 98% of the 253.5 miles on major roads like Julius Schepps Freeway. You'll encounter a very long stretch of highway, 204.4 miles, before transitioning to surface roads like FM 2978 Road. Be prepared for frequent exits and merges characteristic of extensive freeway travel for most of the trip. The final segment on FM 2978 Road will offer a change of pace from the high-speed cruising.
This is a straightforward highway drive that stays mostly on Julius Schepps Freeway and Central Expressway. You will hit about 9 points where you need to pay attention to lane position or signs. The trickiest moment comes around 2 miles in.
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 253.5 miles you will encounter 9 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 2 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 2.4 miles (US 75; TX 121 / Central Expressway): Merge point - match speed before joining. Lane positioning matters here; at 34.9 miles (I 45 / Julius Schepps Freeway): Highway fork - watch signs carefully. Lane positioning matters here.
Mostly flat terrain
Total Climb
372 ft
Total Descent
816 ft
Highest Point
651 ft
~18.1 mi in
Elevation Range
540 ft
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between McKinney, TX and Tomball, TX, road signs point toward Fm 1488: Magnolia and Hempstead.
Fm 1488: Magnolia
Hempstead
Founded 1848
McKinney is a city in the Blackland Prairie region of Texas.
Founded 1907
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Weekend Trip
Doable as a same-day drive at 4h 34m. Total distance: 253.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 34m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (98%). Some complex stretches to watch for.
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, USGS 3DEP for elevation, and FHWA TMAS for hourly traffic volumes. See our methodology for refresh cadence and limitations.
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