How far is Fort Carson, CO from Longmont, CO?
The driving distance from Fort Carson, CO to Longmont, CO is about 128.6 miles (206.9 km), with a travel time of about 02h 10m by car.
- The straight-line flight distance is about 100.2 miles (161.2 km).
- For a round trip, plan for roughly 04h 20m 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 02h 10m.
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.
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 Fort Carson and Longmont.
Turn-by-Turn Driving Directions
Step-by-step road directions between Fort Carson and Longmont.
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1
Start on Prussman Avenue
640 ft · 24 sec · Prussman Avenue
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2
Turn right onto Chiles Avenue
1 mi · 3 min · Chiles Avenue
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3
Turn left onto O'Connell Boulevard
2033 ft · 41 sec · O'Connell Boulevard
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4
Take the ramp straight
2207 ft · 54 sec
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5
Merge slight left
4.4 mi · 7 min
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6
Turn left onto I 25 North, US 24 West: Denver
609 ft · 14 sec
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7
Take the ramp straight toward I 25 North, US 24 West: Denver
1448 ft · 35 sec
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8
Merge slight left onto Monument Valley Freeway
7.7 mi · 9 min · Monument Valley Freeway
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9
Continue on Ronald Reagan Highway
70.1 mi · 1 hr 18 min · Ronald Reagan Highway
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10
Keep slight right to continue on North Valley Highway
4.3 mi · 6 min · North Valley Highway
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11
Keep slight right to continue on North Valley Highway
5.3 mi · 6 min · North Valley Highway
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12
Continue on Dwight D. Eisenhower Highway
12.2 mi · 12 min · Dwight D. Eisenhower Highway
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13
Take the exit slight right toward CO 119 West: Firestone Boulevard
996 ft · 19 sec
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14
Keep slight left to continue on CO 119 West: Longmont
88 m · 8 sec
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15
Turn left onto Highway 119
3.1 mi · 4 min · Highway 119
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16
Continue on East Ken Pratt Boulevard
1.6 mi · 2 min · East Ken Pratt Boulevard
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17
Take the exit slight right
69 m · 7 sec
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18
Turn right onto East 3rd Avenue
1.9 mi · 4 min · East 3rd Avenue
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19
Turn right onto Kimbark Street
1084 ft · 55 sec · Kimbark Street
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20
Turn left
57 m · 16 sec
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21
Turn right
33 m · 8 sec
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22
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Fort Carson 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.
Ronald Reagan Highway
Continue on Ronald Reagan Highway
70.1 mi · 01h 18m
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.
Mostly Sunny leaving Fort Carson and Sunny near Longmont.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Fort Carson to Longmont?
The road trip is about 128.6 miles (206.9 km) and usually takes 02h 10m 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?
Carriage Club is a useful midpoint, sitting about 56.8 miles from Fort Carson and 71.7 miles from Longmont.
How much longer is the road route than the straight-line distance?
The direct path is about 100.2 miles (161.2 km), while the road route adds roughly 28.4 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 2:10 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $16.79 one way or $33.58 round trip. Estimated CO2 is about 40.3 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Fort Carson and Sunny near Longmont.
Stop Ideas Near Carriage Club
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City of Littleton
Aurora City Water Resources
Greenwood Village City Hall
Town Hall Arts Center
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Carriage Club.
Denver (Bus Station), Colorado
Union Station
Pine Junction, CO
Boulder, Colorado
Flight Path Map
This map shows the direct air route between Fort Carson and Longmont. Straight-line distance: 100.18 mi (161.23 km).
#1 Fort Carson
United States Army installation
| Population | 13,813 |
| Coordinates | 38.7374900, -104.7888600 |
| Altitude | 1780 |
| 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: 207 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 16m |
| 40 mph (64.37 km/h) | 03h 12m |
| 50 mph (80.47 km/h) | 02h 34m |
| 60 mph (96.56 km/h) | 02h 08m |
| 70 mph (112.65 km/h) | 01h 50m |
| 80 mph (129 km/h) | 01h 36m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $16.79 | $33.58 |
| Mid-grade | $4.08 | $18.54 | $37.08 |
| Premium | $4.39 | $19.94 | $39.87 |
| Diesel | $4.74 | $21.51 | $43.01 |
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.