How far is Thornton, CO from Niwot, CO?
The driving distance from Thornton, CO to Niwot, CO is about 27.5 miles (44.3 km), with a travel time of about 00h 40m by car.
- The straight-line flight distance is about 19.4 miles (31.2 km).
- For a round trip, plan for roughly 01h 21m 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 40m.
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.
City in Weld County, Colorado, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny then Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Thornton and Niwot.
Turn-by-Turn Driving Directions
Step-by-step road directions between Thornton and Niwot.
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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
1755 ft · 44 sec · Thornton Parkway
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4
Turn right onto Washington Street
1.6 km · 2 min · Washington Street
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5
Turn left onto East 104th Avenue
2512 ft · 57 sec · East 104th Avenue
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6
Take the ramp slight right toward I 25 North
1401 ft · 26 sec
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7
Merge slight left onto North Valley Highway
1.1 mi · 1 min · North Valley Highway
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8
Keep slight right to continue on North Valley Highway
5.3 mi · 6 min · North Valley Highway
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9
Continue on Dwight D. Eisenhower Highway
7.1 mi · 7 min · Dwight D. Eisenhower Highway
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10
Take the exit slight right toward CO 52: Dacono, Fort Lupton, Frederick, Niwot
1905 ft · 48 sec
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11
Turn left
10.1 mi · 17 min
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12
Turn right onto North 79th Street
1 mi · 2 min · North 79th Street
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13
At the end of the road, turn left onto Niwot Road
61 m · 5 sec · Niwot Road
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14
Turn slight right onto 2nd Avenue
733 ft · 34 sec · 2nd Avenue
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15
Turn right onto Franklin Street
138 m · 20 sec · Franklin Street
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16
Arrive at your destination
0 m · 1 sec · Franklin Street
Car Route Details
A richer read on the saved driving route between Thornton and Niwot.
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.
Longest stretch
Turn left
10.1 mi · 00h 17m
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 then Slight Chance Rain Showers leaving Thornton and Mostly Sunny then Chance Rain Showers near Niwot.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Thornton to Niwot?
The road trip is about 27.5 miles (44.3 km) and usually takes 00h 40m 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?
Dacono is a useful midpoint, sitting about 13.7 miles from Thornton and 13.7 miles from Niwot.
How much longer is the road route than the straight-line distance?
The direct path is about 19.4 miles (31.2 km), while the road route adds roughly 8.1 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 7:08 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $3.59 one way or $7.17 round trip. Estimated CO2 is about 8.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance Rain Showers around Thornton and Mostly Sunny then Chance Rain Showers near Niwot.
Stop Ideas Near Dacono
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Historic Brighton City Hall
Broomfield City Council
Lafayette City Hall
Old Town Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Dacono.
Longmont, Colorado
Boulder, Colorado
Denver (Bus Station), Colorado
Union Station
Flight Path Map
This map shows the direct air route between Thornton and Niwot. Straight-line distance: 19.4 mi (31.22 km).
#1 Thornton
The seventh most populous city in Colorado.
| Population | 148,113 |
| Coordinates | 39.8680400, -104.9719200 |
| Altitude | 1631 |
| Country | United States |
#2 Niwot
Census designated place
| Population | 4,006 |
| Coordinates | 40.1038700, -105.1708200 |
| Altitude | 1553 |
| Country | United States |
End: Niwot (-105.17082, 40.10387)
Estimated Travel Time
Distance: 44 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 54m |
| 40 mph (64.37 km/h) | 00h 41m |
| 50 mph (80.47 km/h) | 00h 33m |
| 60 mph (96.56 km/h) | 00h 27m |
| 70 mph (112.65 km/h) | 00h 23m |
| 80 mph (129 km/h) | 00h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $3.59 | $7.17 |
| Mid-grade | $4.08 | $3.96 | $7.92 |
| Premium | $4.39 | $4.26 | $8.52 |
| Diesel | $4.74 | $4.59 | $9.19 |
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.