How far is Silverthorne, CO from Thornton, CO?
The driving distance from Silverthorne, CO to Thornton, CO is about 74.3 miles (119.6 km), with a travel time of about 01h 20m by car.
- The straight-line flight distance is about 60.8 miles (97.8 km).
- For a round trip, plan for roughly 02h 40m 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 01h 20m.
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.
City in Clear Creek County, Colorado, United States
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 Silverthorne and Thornton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Silverthorne and Thornton.
-
1
Start on Blue River Parkway
2210 ft · 60 sec · Blue River Parkway
-
2
Continue straight
746 ft · 25 sec
-
3
Take the exit left toward I 70 East
1368 ft · 25 sec
-
4
Merge slight left
63 mi · 1 hr 16 min
-
5
Keep slight left to continue on Heartland Expressway
5.1 mi · 6 min · Heartland Expressway
-
6
Take the exit slight right toward I 25: Fort Collins, Colorado Springs
1098 ft · 21 sec
-
7
Keep slight left to continue on I 25 North: Fort Collins
1.4 mi · 3 min
-
8
Merge slight left onto North Valley Highway
1.4 km · 1 min · North Valley Highway
-
9
Keep slight right to continue on North Valley Highway
1.3 mi · 2 min · North Valley Highway
-
10
Take the exit slight right toward Thornton Parkway
2280 ft · 43 sec
-
11
Turn right onto Thornton Parkway
1.4 km · 2 min · Thornton Parkway
-
12
Turn right onto Dorothy Boulevard
1077 ft · 51 sec · Dorothy Boulevard
-
13
Turn right
36 m · 9 sec
-
14
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Silverthorne and Thornton.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 70 East
Merge slight left
63 mi · 01h 16m
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 Silverthorne and Sunny near Thornton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Silverthorne to Thornton?
The road trip is about 74.3 miles (119.6 km) and usually takes 01h 20m 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?
Idaho Springs is a useful midpoint, sitting about 37.1 miles from Silverthorne and 37.2 miles from Thornton.
How much longer is the road route than the straight-line distance?
The direct path is about 60.8 miles (97.8 km), while the road route adds roughly 13.5 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 3:50 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $9.69 one way or $19.38 round trip. Estimated CO2 is about 23.3 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Silverthorne and Sunny near Thornton.
Stop Ideas Near Idaho Springs
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 Idaho Springs.
Pine Junction, CO
Fraser – Winter Park
Boulder, Colorado
Union Station
Flight Path Map
This map shows the direct air route between Silverthorne and Thornton. Straight-line distance: 60.78 mi (97.82 km).
#1 Silverthorne
Town in Colorado, USA
| Population | 4,906 |
| Coordinates | 39.6321400, -106.0742800 |
| Altitude | 2669 |
| 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: 120 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 28m |
| 40 mph (64.37 km/h) | 01h 51m |
| 50 mph (80.47 km/h) | 01h 29m |
| 60 mph (96.56 km/h) | 01h 14m |
| 70 mph (112.65 km/h) | 01h 03m |
| 80 mph (129 km/h) | 00h 55m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $9.69 | $19.38 |
| Mid-grade | $4.08 | $10.70 | $21.40 |
| Premium | $4.39 | $11.50 | $23.01 |
| Diesel | $4.74 | $12.41 | $24.82 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.