Longmont to Broomfield is 17.7 miles and takes about 26 minutes via Main Street, with a fuel budget near $3 and enough daylight to finish in a day. This short trip stays within Colorado's Mountain West region, offering a straightforward local drive. It's a quick hop perfect for a single-day excursion, requiring minimal planning. Consider this drive if you need to get from one Colorado town to another without venturing onto major highways. It's a practical option for local errands or connecting between nearby communities.
Main Roads
Road
Distance
Duration
Main Street
17.2 mi
24m
West Midway Boulevard
0.2 mi
<1m
Nickel Street
0.1 mi
<1m
West 3rd Avenue
<0.1 mi
<1m
5th Avenue
<0.1 mi
<1m
Longest stretch:
Main Street
— 17.2 mi, about 24m
Turn-by-Turn Driving Directions
Step-by-step road directions between Longmont, CO and Broomfield, CO.
1
Start on this road
63 ft·10 sec·this road
2
Turn left onto 5th Avenue
172 ft·9 sec·5th Avenue
3
Turn left onto US 287
17 mi·24 min·Main Street
Use the left lane.
4
Turn left onto West Midway Boulevard
0.2 mi·29 sec·West Midway Boulevard
Use the left lane.
5
Turn right onto Nickel Street
0.1 mi·22 sec·Nickel Street
Use the right lane.
6
Turn left onto West 3rd Avenue
273 ft·17 sec·West 3rd Avenue
Use the left lane.
7
Turn left
192 ft·14 sec
8
Arrive at destination
Heads-up: tricky spots
5 of 6
5 decision points cluster between mile 0 and 17.6 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0 mi into trip|~0m in|5th Avenue
Turn left onto 5th Avenue
Navigation decision point
4
0 mi into trip|~0m in|US 287 / Main Street
Turn left onto US 287 / Main Street
Lane positioning matters here
Use the left lane.
6
17.4 mi into trip|~25m in|Nickel Street
Turn right onto Nickel Street
Lane positioning matters here
Use the right lane.
6
17.6 mi into trip|~26m in|West 3rd Avenue
Turn left onto West 3rd Avenue
Lane positioning matters here
Use the left lane.
5
17.6 mi into trip|~26m in
Turn left
Navigation decision point
Fuel & Cost
Regular Gas
$2.67 one way
$5.33 round trip
$3.83/gal25.4 MPG avg6 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.05
$2.82
$5.65
premium
$4.39
$3.06
$6.12
diesel
$5.61
$3.91
$7.82
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 6.2 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
5.3
0
$1.86
$0.85
Efficient EV
4.4
0
$1.55
$0.71
EV Truck/SUV
7.1
0
$2.48
$1.13
Gas CO2
6 kg
EV CO2
2 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 18, 2026
Origin
Longmont, CO
Late night
in Longmont on Sunday
Local time
1:35 AM
MDT
Current temp
58°F
Sunny
E 7 mph0% chanceLive forecast
Freeze Warning
Freeze Warning issued April 18 at 10:04AM MDT until April 19 at 9:00AM MDT by NWS Grand Junction CO
Red Flag Warning
Red Flag Warning issued April 18 at 9:19AM MDT until April 18 at 7:00PM MDT by NWS Goodland KS
Destination
Broomfield, CO
Late night
in Broomfield on Sunday
Local time
1:35 AM
MDT
Current temp
56°F
Sunny
NE 7 mph0% chanceLive forecast
Freeze Warning
Freeze Warning issued April 18 at 10:04AM MDT until April 19 at 9:00AM MDT by NWS Grand Junction CO
Red Flag Warning
Red Flag Warning issued April 18 at 9:19AM MDT until April 18 at 7:00PM MDT by NWS Goodland KS
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
2 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
26m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
Expect a turn-heavy local drive for this 17.7-mile journey, with zero highway miles. The longest uninterrupted stretch you'll encounter is 17.2 miles along Main Street, offering a consistent local road experience. You'll primarily navigate using Main Street, West Midway Boulevard, and Nickel Street. This route emphasizes local road navigation rather than high-speed travel, so be prepared for frequent turns and varying speed limits as you pass through town.
Only 0% highway — the rest is turn-by-turn surface driving.
8 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 17.2 mi on Main Street.
How Hard Is This Drive?
4/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near 5th Avenue.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 26m drive. You will face about 6 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: near the start (5th Avenue): Navigation decision point; near the start (US 287 / Main Street): Lane positioning matters here; at 17.4 miles (Nickel Street): Lane positioning matters here.
Discover Along the Route
Interesting stops within a short detour of your drive.
Broomfield is a combined city and county of about 77,000 in the Denver Metropolitan Area of the western U.S. state of Colorado. Broomfield lies 14 miles (23 km) northwest of Denver and 12 miles (19 km) southeast of Boulder. The only other combined city and county in Colorado is the City and County of Denver, the state capital.
The longest stretch is about 17.2 miles on Main Street. The full list of main roads is in the Roads section above.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
The main spots that need attention: near the start (5th Avenue): Navigation decision point; near the start (US 287 / Main Street): Lane positioning matters here; at 17.4 miles (Nickel Street): Lane positioning matters here.
Yes. A round trip is manageable in a single day if you plan a break at Broomfield, CO before heading back.
