How far is Firestone, CO from Thornton, CO?
The driving distance from Firestone, CO to Thornton, CO is about 20.6 miles (33.2 km), with a travel time of about 00h 26m by car.
- The straight-line flight distance is about 17 miles (27.3 km).
- For a round trip, plan for roughly 00h 52m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM MDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 00h 26m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Town in Boulder County, Colorado, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Firestone and Thornton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Firestone and Thornton.
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1
Start on Granville Avenue
734 ft · 38 sec · Granville Avenue
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2
At the end of the road, turn left onto 1st Street
983 ft · 28 sec · 1st Street
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3
Turn right onto McClure Avenue
774 ft · 29 sec · McClure Avenue
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4
Turn left onto Colorado Boulevard
1.2 km · 1 min · Colorado Boulevard
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5
Enter the roundabout and take exit 1 toward Colorado Boulevard
35 m · 5 sec · Colorado Boulevard
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6
Exit the roundabout onto Colorado Boulevard
2651 ft · 51 sec · Colorado Boulevard
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7
Enter the roundabout and take exit 2 toward Colorado Boulevard
54 m · 4 sec · Colorado Boulevard
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8
Exit the roundabout onto Colorado Boulevard
911 ft · 17 sec · Colorado Boulevard
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9
Turn slight right
89 m · 11 sec
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10
Turn straight
2.1 mi · 4 min
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11
Turn left onto I 25 South: Denver
2084 ft · 53 sec
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12
Merge slight left onto Dwight D. Eisenhower Highway
7 mi · 7 min · Dwight D. Eisenhower Highway
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13
Continue on North Valley Highway
3187 ft · 36 sec · North Valley Highway
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14
Keep slight right to continue on North Valley Highway
7 mi · 8 min · North Valley Highway
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15
Take the exit slight right toward Thornton Parkway
1181 ft · 23 sec
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16
Keep slight left to continue on Thornton Parkway East
35 m · 5 sec
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17
Turn left onto Thornton Parkway
1.6 km · 2 min · Thornton Parkway
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18
Turn right onto Dorothy Boulevard
1077 ft · 51 sec · Dorothy Boulevard
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19
Turn right
36 m · 9 sec
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20
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Firestone and Thornton.
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.
Dwight D. Eisenhower Highway
Merge slight left onto Dwight D. Eisenhower Highway
7.03 mi · 00h 07m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Mostly Sunny leaving Firestone and Sunny near Thornton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Firestone to Thornton?
The road trip is about 20.6 miles (33.2 km) and usually takes 00h 26m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Erie is a useful midpoint, sitting about 10.3 miles from Firestone and 10.3 miles from Thornton.
How much longer is the road route than the straight-line distance?
The direct path is about 17 miles (27.3 km), while the road route adds roughly 3.6 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 7:00 AM to 7:00 PM MDT. If you want a more comfortable same-day return, try to leave by 7:38 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.70 one way or $5.40 round trip. Estimated CO2 is about 6.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Firestone and Sunny near Thornton.
Stop Ideas Near Erie
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Municipal Court Park
Broomfield City Council
Lafayette City Hall
Historic Brighton City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Erie.
Longmont, Colorado
Boulder, Colorado
Union Station
Denver (Bus Station), Colorado
Flight Path Map
This map shows the direct air route between Firestone and Thornton. Straight-line distance: 16.99 mi (27.35 km).
#1 Firestone
Human settlement in Weld County, Colorado, United States of America
| Population | 15,298 |
| Coordinates | 40.1124800, -104.9366400 |
| Altitude | 1515 |
| Country | United States |
#2 Thornton
The seventh most populous city in Colorado.
| Population | 148,113 |
| Coordinates | 39.8680400, -104.9719200 |
| Altitude | 1631 |
| Country | United States |
End: (-104.971859, 39.868064)
Estimated Travel Time
Distance: 33 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 41m |
| 40 mph (64.37 km/h) | 00h 30m |
| 50 mph (80.47 km/h) | 00h 24m |
| 60 mph (96.56 km/h) | 00h 20m |
| 70 mph (112.65 km/h) | 00h 17m |
| 80 mph (129 km/h) | 00h 15m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $2.70 | $5.40 |
| Mid-grade | $4.08 | $2.98 | $5.96 |
| Premium | $4.39 | $3.21 | $6.41 |
| Diesel | $4.74 | $3.46 | $6.92 |
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 22, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.