How far is Thornton, CO from Pierce, CO?
The driving distance from Thornton, CO to Pierce, CO is about 66.8 miles (107.5 km), with a travel time of about 01h 24m by car.
- The straight-line flight distance is about 54.2 miles (87.3 km).
- For a round trip, plan for roughly 02h 48m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MST.
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 01h 24m.
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.
Municipality in Colorado, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Driving Route Map
The map below follows the saved road route between Thornton and Pierce.
Turn-by-Turn Driving Directions
Step-by-step road directions between Thornton and Pierce.
-
1
Start on the route
23 m · 12 sec
-
2
Turn left onto Dorothy Boulevard
1165 ft · 59 sec · Dorothy Boulevard
-
3
At the end of the road, turn left onto Thornton Parkway
1755 ft · 44 sec · Thornton Parkway
-
4
Turn right onto Washington Street
1.6 km · 2 min · Washington Street
-
5
Turn left onto East 104th Avenue
2512 ft · 57 sec · East 104th Avenue
-
6
Take the ramp slight right toward I 25 North
1401 ft · 26 sec
-
7
Merge slight left onto North Valley Highway
1.1 mi · 1 min · North Valley Highway
-
8
Keep slight right to continue on North Valley Highway
5.3 mi · 6 min · North Valley Highway
-
9
Continue on Dwight D. Eisenhower Highway
41.4 mi · 41 min · Dwight D. Eisenhower Highway
-
10
Take the exit slight right toward CO 14 East: Ault
1512 ft · 37 sec
-
11
Turn straight onto East Mulberry Street
1.4 km · 1 min · East Mulberry Street
-
12
Continue on East Highway 14
10 mi · 16 min · East Highway 14
-
13
Turn left onto County Road 29
3 mi · 4 min · County Road 29
-
14
Turn right onto County Road 88
1.7 mi · 6 min · County Road 88
-
15
Turn left onto 5th Street
1.1 km · 2 min · 5th Street
-
16
Turn right onto West Main Avenue
1065 ft · 35 sec · West Main Avenue
-
17
Turn left onto 2nd Street
10 m · 2 sec · 2nd Street
-
18
Arrive at your destination
0 m · 1 sec · 2nd Street
Car Route Details
A richer read on the saved driving route between Thornton and Pierce.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Dwight D. Eisenhower Highway
Continue on Dwight D. Eisenhower Highway
41.4 mi · 00h 41m
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.
Sunny leaving Thornton and Sunny near Pierce.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Thornton to Pierce?
The road trip is about 66.8 miles (107.5 km) and usually takes 01h 24m 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?
Johnstown is a useful midpoint, sitting about 33.4 miles from Thornton and 33.4 miles from Pierce.
How much longer is the road route than the straight-line distance?
The direct path is about 54.2 miles (87.3 km), while the road route adds roughly 12.6 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 8:00 AM to 10:00 AM MST. If you want a more comfortable same-day return, try to leave by 3:42 PM MST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $9.56 one way or $19.13 round trip. Estimated CO2 is about 21 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Thornton and Sunny near Pierce.
Stop Ideas Near Johnstown
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 Johnstown.
Longmont, Colorado
Fort Collins, Colorado
Boulder, Colorado
Union Station
Flight Path Map
This map shows the direct air route between Thornton and Pierce. Straight-line distance: 54.25 mi (87.3 km).
#1 Thornton
The seventh most populous city in Colorado.
| Population | 148,113 |
| Coordinates | 39.8680400, -104.9719200 |
| Altitude | 1631 |
| Country | United States |
#2 Pierce
Human settlement in Weld County, Colorado, United States of America
| Population | 938 |
| Coordinates | 40.6355400, -104.7552500 |
| Altitude | 1535 |
| Country | United States |
End: Pierce (-104.75525, 40.63554)
Estimated Travel Time
Distance: 108 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 13m |
| 40 mph (64.37 km/h) | 01h 40m |
| 50 mph (80.47 km/h) | 01h 20m |
| 60 mph (96.56 km/h) | 01h 06m |
| 70 mph (112.65 km/h) | 00h 57m |
| 80 mph (129 km/h) | 00h 50m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.05 | $9.56 | $19.13 |
| Mid-grade | $4.45 | $10.49 | $20.99 |
| Premium | $4.76 | $11.24 | $22.48 |
| Diesel | $6.31 | $14.90 | $29.80 |
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 · Nov 06, 2026