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Drive Time
2h 31m
Distance
140.8 mi
227 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$21
one way
EV Charging
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station data
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Sterling, CO
Wikimedia Commons
Boulder, CO
Wikimedia Commons
The drive from Sterling, CO to Boulder, CO covers 140.8 miles and takes about 2h 31m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 76, E-470, Northwest Parkway for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 104.3 miles on I 76. At current regular gas prices, budget about $21.21 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
70.4 miles from Sterling, CO
A natural place for your longest stop of the day , about 1h 12m into the drive .
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This is a 2h 31m highway drive covering 140.8 miles, with most of the trip on I 76 and E-470. The longest continuous stretch is about 104.3 miles on I 76.
This is a straightforward highway drive that stays mostly on I 76 and E-470. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 106.4 miles in.
High effort - long or complex enough to need steady focus all day
This is a demanding drive. With 18 significant decision points across 140.8 miles, you will need to stay alert — especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 106.4 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 109.5 miles: Lane positioning matters here; at 130.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
These are the spots where you need to pay the most attention. Preview them before you drive.
Take the exit toward 136th Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here
Turn left toward E 470 Toll North
Lane positioning matters here
Take the exit toward US 36 West: Boulder
Exit ramp - move to the correct lane early. Lane positioning matters here
Keep slight right at fork onto US 36 / Denver–Boulder Turnpike
Highway fork - watch signs carefully. Lane positioning matters here
Keep slight left at fork onto US 36 / Denver–Boulder Turnpike
Highway fork - watch signs carefully. Lane positioning matters here
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Sterling, CO to Boulder, CO, road signs begin pointing toward E 470 Toll North along the way.
E 470 Toll North
| Road | Distance | Duration |
|---|---|---|
| I 76 | 104.3 mi | 1h 44m |
| E-470 | 12.6 mi | 12m |
| Northwest Parkway | 8.3 mi | 9m |
| Denver–Boulder Turnpike | 8.3 mi | 9m |
| Buckley Road | 2 mi | 3m |
| East Chestnut Street | 1.4 mi | 2m |
| 28th Street | 0.8 mi | 1m |
| Arapahoe Avenue | 0.6 mi | 1m |
Step-by-step road directions between Sterling, CO and Boulder, CO.
Start on this road
Turn left onto North 3rd Street
Turn right onto US 6
Continue on US 6
Take the ramp
Merge onto I 76
Take the exit
Turn right onto East 136th Avenue
Turn left onto Buckley Road
Turn left onto East 120th Avenue
Turn left
Merge onto E470
Continue on NW
Take the exit
Merge onto US 36
Keep slight right at fork onto US 36
Keep slight right at fork onto US 36
Keep slight left at fork onto US 36
Continue on US 36
Turn left onto Arapahoe Avenue
Turn right onto 19th Street
Turn left
Arrive at destination
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 80 miles or 1h 22m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 70.4 miles or 1h 12m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 1m
Traffic, exits, and arrival timing usually matter more near Boulder, CO than in the middle of the route.
Open the route before leaving Sterling, CO so your first major turns are already loaded.
Leave with enough water and a charging cable within reach, not packed away.
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Sterling, CO
This is one driving day of about 140.8 miles and 2h 31m.
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 70.4 mi from Sterling, CO · 1h 12m into the drive
Mid-route town
Meal stop
70 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
A short stop after about 80 miles helps settle the day before fatigue starts building.
The midpoint is around 70.4 miles from Sterling, CO, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before I 76 if your tank is already low. That segment runs about 104.3 miles.
The final approach into Boulder, CO usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Boulder, CO.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Regular Gas
$21.21 one way
$42.43 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.05 | $22.46 | $44.92 |
| premium | $4.39 | $24.36 | $48.71 |
| diesel | $5.61 | $31.09 | $62.17 |
Estimated Tolls: $3.09
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$21
Tolls
$3
Meals
$25–$50
Total
$49–$74
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 49.3 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $15 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 42.2 | 0 | $14.78 | $6.76 |
| Efficient EV | 35.2 | 0 | $12.32 | $5.63 |
| EV Truck/SUV | 56.3 | 0 | $19.71 | $9.01 |
Gas CO2
49 kg
EV CO2
16 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.
Current conditions at both ends of the drive.
Origin
Late night in Sterling on Wednesday
Local time
4:35 AM
MDT
Current temp
42°F
Mostly Cloudy
Destination
Late night in Boulder on Wednesday
Local time
4:35 AM
MDT
Current temp
72°F
Unavailable
44°F
Brighton, CO
70 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
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.
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