How far is Clifton, CO from Longmont, CO?
The driving distance from Clifton, CO to Longmont, CO is about 270.9 miles (436 km), with a travel time of about 04h 23m by car.
- The straight-line flight distance is about 193 miles (310.6 km).
- For a round trip, plan for roughly 08h 47m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 04h 23m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
Home Rule Municipality that is a town in Eagle County, Colorado, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Snow Showers
Driving Route Map
The map below follows the saved road route between Clifton and Longmont.
Turn-by-Turn Driving Directions
Step-by-step road directions between Clifton and Longmont.
-
1
Start on F Road
108 m · 10 sec · F Road
-
2
Enter the roundabout and take exit 2 toward F Road
24 m · 1 sec · F Road
-
3
Exit the roundabout onto F Road
637 ft · 18 sec · F Road
-
4
Turn sharp right
1.2 km · 1 min
-
5
Keep slight right to continue on I 70 East: Denver
233.3 mi · 4 hr 22 min
-
6
Keep slight left to continue on Heartland Expressway
1.3 mi · 2 min · Heartland Expressway
-
7
Take the exit slight right toward CO 95: Sheridan Boulevard
1606 ft · 40 sec
-
8
Turn left onto Sheridan Boulevard
4.6 mi · 8 min · Sheridan Boulevard
-
9
Turn left onto US 36 West: Boulder
1765 ft · 37 sec
-
10
Keep slight left to continue on US 36 West
876 ft · 23 sec
-
11
Merge slight left onto Denver–Boulder Turnpike
1.5 km · 1 min · Denver–Boulder Turnpike
-
12
Keep slight right to continue on Denver–Boulder Turnpike
1.9 mi · 2 min · Denver–Boulder Turnpike
-
13
Keep slight right to continue on Denver–Boulder Turnpike
1.2 km · 52 sec · Denver–Boulder Turnpike
-
14
Take the exit slight right toward CO 121: Wadsworth Parkway
1951 ft · 42 sec
-
15
Turn right
1257 ft · 30 sec
-
16
Continue straight
5.7 mi · 8 min
-
17
Continue straight
1106 ft · 19 sec
-
18
Continue straight
11.5 mi · 16 min
-
19
Turn right onto 5th Avenue
109 m · 20 sec · 5th Avenue
-
20
Turn right onto Kimbark Street
52 m · 9 sec · Kimbark Street
-
21
Turn right
57 m · 16 sec
-
22
Turn right
33 m · 8 sec
-
23
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Clifton and Longmont.
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
Keep slight right to continue on I 70 East: Denver
233 mi · 04h 22m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Clifton and Slight Chance Snow Showers near Longmont.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Clifton to Longmont?
The road trip is about 270.9 miles (436 km) and usually takes 04h 23m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Avon is a useful midpoint, sitting about 131.2 miles from Clifton and 139.7 miles from Longmont.
How much longer is the road route than the straight-line distance?
The direct path is about 193 miles (310.6 km), while the road route adds roughly 77.9 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 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 8:12 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $35.35 one way or $70.71 round trip. Estimated CO2 is about 85 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Clifton and Slight Chance Snow Showers near Longmont.
Stop Ideas Near Avon
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 Avon.
Vail, Colorado
Frisco, Colorado
Fairplay, CO
Glenwood Springs
Flight Path Map
This map shows the direct air route between Clifton and Longmont. Straight-line distance: 192.97 mi (310.55 km).
#1 Clifton
Clifton is a place in Colorado, United States.
| Population | 0 |
| Coordinates | 39.0919300, -108.4489800 |
| Altitude | 1440 |
| Country | United States |
#2 Longmont
The most populous city in Boulder County, Colorado.
| Population | 98,445 |
| Coordinates | 40.1672100, -105.1019300 |
| Altitude | 1519 |
| Country | United States |
End: (-105.101861, 40.16721)
Estimated Travel Time
Distance: 436 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 01m |
| 40 mph (64.37 km/h) | 06h 46m |
| 50 mph (80.47 km/h) | 05h 25m |
| 60 mph (96.56 km/h) | 04h 30m |
| 70 mph (112.65 km/h) | 03h 52m |
| 80 mph (129 km/h) | 03h 22m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $35.35 | $70.71 |
| Mid-grade | $4.08 | $39.04 | $78.09 |
| Premium | $4.39 | $41.98 | $83.96 |
| Diesel | $4.74 | $45.29 | $90.57 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.