How far is Thornton, CO from Granby, CO?
The driving distance from Thornton, CO to Granby, CO is about 92.9 miles (149.5 km), with a travel time of about 02h 18m by car.
- The straight-line flight distance is about 53.4 miles (85.9 km).
- For a round trip, plan for roughly 04h 36m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MDT.
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 18m.
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.
Statutory Town in Clear Creek County, Colorado, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Slight Chance Rain Showers
Chance Snow Showers
Driving Route Map
The map below follows the saved road route between Thornton and Granby.
Turn-by-Turn Driving Directions
Step-by-step road directions between Thornton and Granby.
-
1
Start on the route
23 m · 12 sec
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2
Turn left onto Dorothy Boulevard
1165 ft · 59 sec · Dorothy Boulevard
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3
At the end of the road, turn left onto Thornton Parkway
1.6 km · 2 min · Thornton Parkway
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4
Turn left onto I 25 South: Colorado Springs
1973 ft · 40 sec
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5
Merge slight left onto North Valley Highway
1.2 mi · 2 min · North Valley Highway
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6
Keep slight right to continue on North Valley Highway
1.5 mi · 2 min · North Valley Highway
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7
Take the exit slight right toward I 76 West: Arvada, Grand Junction
1.5 km · 2 min
-
8
Merge slight left onto Heartland Expressway
5.2 mi · 6 min · Heartland Expressway
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9
Merge slight left
36.4 mi · 44 min
-
10
Take the exit slight right toward US 40 west: Empire, Granby
3141 ft · 1 min
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11
Keep slight right
30.5 mi · 51 min
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12
Continue on North Zerex Street
15 mi · 26 min · North Zerex Street
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13
Turn right onto North 2nd Street
57 m · 13 sec · North 2nd Street
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14
Turn left
43 m · 10 sec
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15
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Thornton and Granby.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Heartland Expressway
Merge slight left
36.4 mi · 00h 44m
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 then Slight Chance Rain Showers leaving Thornton and Chance Snow Showers near Granby.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Thornton to Granby?
The road trip is about 92.9 miles (149.5 km) and usually takes 02h 18m 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?
Empire is a useful midpoint, sitting about 46.4 miles from Thornton and 46.5 miles from Granby.
How much longer is the road route than the straight-line distance?
The direct path is about 53.4 miles (85.9 km), while the road route adds roughly 39.5 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 MDT. If you want a more comfortable same-day return, try to leave by 1:54 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $12.13 one way or $24.26 round trip. Estimated CO2 is about 29.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance Rain Showers around Thornton and Chance Snow Showers near Granby.
Stop Ideas Near Empire
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 Empire.
Fraser – Winter Park
Frisco, Colorado
Pine Junction, CO
Granby
Flight Path Map
This map shows the direct air route between Thornton and Granby. Straight-line distance: 53.39 mi (85.93 km).
#1 Thornton
The seventh most populous city in Colorado.
| Population | 148,113 |
| Coordinates | 39.8680400, -104.9719200 |
| Altitude | 1631 |
| Country | United States |
#2 Granby
Statutory town in Grand County, Colorado, United States
| Population | 2,174 |
| Coordinates | 40.0861000, -105.9394600 |
| Altitude | 2428 |
| Country | United States |
End: Granby (-105.93946, 40.0861)
Estimated Travel Time
Distance: 149 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 05m |
| 40 mph (64.37 km/h) | 02h 19m |
| 50 mph (80.47 km/h) | 01h 51m |
| 60 mph (96.56 km/h) | 01h 32m |
| 70 mph (112.65 km/h) | 01h 19m |
| 80 mph (129 km/h) | 01h 09m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $12.13 | $24.26 |
| Mid-grade | $4.08 | $13.40 | $26.79 |
| Premium | $4.39 | $14.40 | $28.80 |
| Diesel | $4.74 | $15.54 | $31.07 |
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 Colorado · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.