How far is Eaton, CO from Longmont, CO?
The driving distance from Eaton, CO to Longmont, CO is about 48 miles (77.2 km), with a travel time of about 00h 57m by car.
- The straight-line flight distance is about 32.4 miles (52.2 km).
- For a round trip, plan for roughly 01h 54m 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 00h 57m.
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.
The eighth most populous city in Colorado.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Eaton and Longmont.
Turn-by-Turn Driving Directions
Step-by-step road directions between Eaton and Longmont.
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1
Start on Oak Avenue
151 m · 15 sec · Oak Avenue
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2
Continue on Oak Avenue
2602 ft · 1 min · Oak Avenue
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3
Turn right onto Collins Street
1.3 mi · 3 min · Collins Street
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4
Enter the roundabout and take exit 2 toward Fall Line Road
37 m · 2 sec · County Road 74
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5
Exit the rotary onto County Road 74
1 mi · 1 min · County Road 74
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6
Enter the roundabout and take exit 2 toward County Road 74
40 m · 2 sec · County Road 74
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7
Exit the roundabout onto County Road 74
3.1 mi · 4 min · County Road 74
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8
Continue on East Harmony Road
1.7 mi · 3 min · East Harmony Road
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9
Continue on East 4th Avenue
3128 ft · 2 min · East 4th Avenue
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10
Continue on East Harmony Road
1 mi · 2 min · East Harmony Road
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11
Continue on County Road 74
2.2 mi · 4 min · County Road 74
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12
Continue on Harmony Road
4 mi · 7 min · Harmony Road
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13
Turn left onto I 25 South
1417 ft · 35 sec
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14
Merge slight left onto Dwight D. Eisenhower Highway
24.6 mi · 25 min · Dwight D. Eisenhower Highway
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15
Take the exit slight right toward CO 119 West
1528 ft · 29 sec
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16
Turn right onto Highway 119
3 mi · 4 min · Highway 119
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17
Continue on East Ken Pratt Boulevard
1.6 mi · 2 min · East Ken Pratt Boulevard
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18
Take the exit slight right
69 m · 7 sec
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19
Turn right onto East 3rd Avenue
1.9 mi · 4 min · East 3rd Avenue
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20
Turn right onto Kimbark Street
1084 ft · 55 sec · Kimbark Street
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21
Turn left
57 m · 16 sec
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22
Turn right
33 m · 8 sec
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23
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Eaton 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.
Dwight D. Eisenhower Highway
Merge slight left onto Dwight D. Eisenhower Highway
24.6 mi · 00h 25m
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 Eaton and Sunny near Longmont.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Eaton to Longmont?
The road trip is about 48 miles (77.2 km) and usually takes 00h 57m 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?
Loveland is a useful midpoint, sitting about 23.7 miles from Eaton and 24.2 miles from Longmont.
How much longer is the road route than the straight-line distance?
The direct path is about 32.4 miles (52.2 km), while the road route adds roughly 15.6 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 4:36 PM MST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.47 one way or $12.93 round trip. Estimated CO2 is about 15 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Eaton and Sunny near Longmont.
Stop Ideas Near Loveland
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 Loveland.
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Flight Path Map
This map shows the direct air route between Eaton and Longmont. Straight-line distance: 32.44 mi (52.2 km).
#1 Eaton
Human settlement in Weld County, Colorado, United States of America
| Population | 6,000 |
| Coordinates | 40.5302600, -104.7113500 |
| Altitude | 1475 |
| 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: 77 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 35m |
| 40 mph (64.37 km/h) | 01h 11m |
| 50 mph (80.47 km/h) | 00h 57m |
| 60 mph (96.56 km/h) | 00h 47m |
| 70 mph (112.65 km/h) | 00h 41m |
| 80 mph (129 km/h) | 00h 35m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.83 | $6.47 | $12.93 |
| Mid-grade | $4.21 | $7.11 | $14.22 |
| Premium | $4.53 | $7.65 | $15.30 |
| Diesel | $6.11 | $10.32 | $20.65 |
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 11, 2026