How far is Trinidad, CO from Longmont, CO?
The driving distance from Trinidad, CO to Longmont, CO is about 247.2 miles (397.9 km), with a travel time of about 03h 50m by car.
- The straight-line flight distance is about 209.7 miles (337.4 km).
- For a round trip, plan for roughly 07h 40m 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 03h 50m.
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.
City in Colorado, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Trinidad and Longmont.
Turn-by-Turn Driving Directions
Step-by-step road directions between Trinidad and Longmont.
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1
Start on South Ash Street
91 m · 19 sec · South Ash Street
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2
Turn left onto East Main Street
1454 ft · 42 sec · East Main Street
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3
Turn right onto North Commercial Street
1831 ft · 37 sec · North Commercial Street
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4
Take the ramp right toward I 25 North
1265 ft · 31 sec
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5
Merge slight left
125.2 mi · 2 hr 9 min
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6
Continue on Monument Valley Freeway
8.5 mi · 10 min · Monument Valley Freeway
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7
Continue on Ronald Reagan Highway
70.1 mi · 1 hr 18 min · Ronald Reagan Highway
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8
Keep slight right to continue on North Valley Highway
4.3 mi · 6 min · North Valley Highway
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9
Keep slight right to continue on North Valley Highway
5.3 mi · 6 min · North Valley Highway
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10
Continue on Dwight D. Eisenhower Highway
12.2 mi · 12 min · Dwight D. Eisenhower Highway
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11
Take the exit slight right toward CO 119 West: Firestone Boulevard
996 ft · 19 sec
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12
Keep slight left to continue on CO 119 West: Longmont
88 m · 8 sec
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13
Turn left onto Highway 119
3.1 mi · 4 min · Highway 119
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14
Continue on East Ken Pratt Boulevard
1.6 mi · 2 min · East Ken Pratt Boulevard
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15
Take the exit slight right
69 m · 7 sec
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16
Turn right onto East 3rd Avenue
1.9 mi · 4 min · East 3rd Avenue
-
17
Turn right onto Kimbark Street
1084 ft · 55 sec · Kimbark Street
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18
Turn left
57 m · 16 sec
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19
Turn right
33 m · 8 sec
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20
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Trinidad 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 25 North
Merge slight left
125 mi · 02h 09m
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 Trinidad and Mostly Sunny near Longmont.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Trinidad to Longmont?
The road trip is about 247.2 miles (397.9 km) and usually takes 03h 50m 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?
Fountain is a useful midpoint, sitting about 116.9 miles from Trinidad and 130.3 miles from Longmont.
How much longer is the road route than the straight-line distance?
The direct path is about 209.7 miles (337.4 km), while the road route adds roughly 37.5 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 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 9:20 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $37.83 one way or $75.65 round trip. Estimated CO2 is about 77.6 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Trinidad and Mostly Sunny near Longmont.
Stop Ideas Near Fountain
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 Fountain.
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Flight Path Map
This map shows the direct air route between Trinidad and Longmont. Straight-line distance: 209.65 mi (337.4 km).
#1 Trinidad
Home Rule Municipality in Las Animas County, Colorado, United States
| Population | 8,127 |
| Coordinates | 37.1694600, -104.5005400 |
| Altitude | 1839 |
| 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: 398 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 14m |
| 40 mph (64.37 km/h) | 06h 10m |
| 50 mph (80.47 km/h) | 04h 56m |
| 60 mph (96.56 km/h) | 04h 07m |
| 70 mph (112.65 km/h) | 03h 31m |
| 80 mph (129 km/h) | 03h 05m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.33 | $37.83 | $75.65 |
| Mid-grade | $4.73 | $41.28 | $82.57 |
| Premium | $5.07 | $44.23 | $88.47 |
| Diesel | $6.62 | $57.80 | $115.60 |
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 · Oct 20, 2026