Origin
Broomfield, CO
Late night in Broomfield on Friday
Local time
5:04 AM
MDT
Current temp
75°F
Unavailable
Live forecast
Trip from Broomfield, CO to Castle Rock, CO
Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 17, 2026 · Editorial standards
Drive Time
58m
Distance
46 mi
74 km
Drive Score
7/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$7
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 54m
★
6 AM
0h 59m
8 AM
1h 8m
10 AM
1h 2m
12 PM
1h 1m
3 PM
1h 3m
5 PM
1h 8m
8 PM
0h 56m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Broomfield, CO
Owen.outdoors
Castle Rock, CO
Wikimedia Commons
Trip Overview
The drive from Broomfield, CO to Castle Rock, CO covers 46 miles and takes about 58m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on North Valley Highway, Denver–Boulder Turnpike, CO 121 for much of the mileage, and the overall profile is turn-heavy local drive. The longest uninterrupted segment is about 34.2 miles on North Valley Highway. At current regular gas prices, budget about $6.93 one way before food or hotel costs.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 58m. Total distance: 46 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
58m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
Scenic Drive
Turn-heavy local drive route profile.
Drive Character
Expect a 58m drive with frequent turns across 46 miles of local and secondary roads.
This route has more turning and local-road decision points than a simple highway run.
There are about 21 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
North Valley Highway is the longest continuous segment at about 34.2 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes early in the drive near West 3rd Avenue.
Driving Effort
10/10
Focused - lots of decisions in a short distance, but it is over quickly
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 16 decision points packed into just 46 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 58m.
Where does it get tricky?
The main spots that need attention: near the start (West 3rd Avenue): Complex interchange - multiple decisions in a short stretch; at 0.3 miles: Highway fork - watch signs carefully; at 1 miles: Lane positioning matters here.
Critical Maneuvers
5 of 16 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
6
0 mi into trip
|
~0m in
|
West 3rd Avenue
At end of road, turn right onto West 3rd Avenue
Complex interchange - multiple decisions in a short stretch
6
0.3 mi into trip
|
~1m in
Keep slight left at fork toward CO 121 South
Highway fork - watch signs carefully
Toward CO 121 South
7
1 mi into trip
|
~2m in
Turn left toward US 36 East: Denver
Lane positioning matters here
Use the left lane.
Toward US 36 East: Denver
8
8.9 mi into trip
|
~12m in
|
US 36 / Denver–Boulder Turnpike
Keep slight right at fork onto US 36 / Denver–Boulder Turnpike toward I 25: Denver, Fort Collins
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 25: Denver, Fort Collins
8
45 mi into trip
|
~55m in
Take the exit toward Wilcox Street, Wolfensberger Road
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 182
Toward Wilcox Street, Wolfensberger Road
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Broomfield, CO to Castle Rock, CO, road signs begin pointing toward Fort Collins along the way.
Fort Collins
8.9 mi in
|
~12m
|
via US 36
Main Roads
| Road | Distance | Duration |
|---|---|---|
| North Valley Highway | 34.2 mi | 40m |
| Denver–Boulder Turnpike | 8.7 mi | 10m |
| CO 121 | 0.4 mi | 1m |
| North Wilcox Street | 0.4 mi | 1m |
| I 25 | 0.4 mi | <1m |
| 5th Street | 0.2 mi | <1m |
| North Cantril Street | 0.2 mi | <1m |
| Nickel Street | 0.2 mi | <1m |
Longest stretch:
North Valley Highway
— 34.2 mi, about 40m
Turn-by-Turn Driving Directions
Step-by-step road directions between Broomfield, CO and Castle Rock, CO.
1
Start on this road
192 ft
·
16 sec
·
this road
2
At end of road, turn right onto West 3rd Avenue
273 ft
·
19 sec
·
West 3rd Avenue
3
Turn left onto Nickel Street
0.2 mi
·
26 sec
·
Nickel Street
4
Turn right onto US 287
140 ft
·
3 sec
·
US 287
5
Keep slight left at fork
0.3 mi
·
45 sec
Toward CO 121 South
6
Turn straight onto CO 121
0.4 mi
·
1 min
·
CO 121
7
Turn left
0.3 mi
·
44 sec
Toward US 36 East: Denver
Use the left lane.
8
Merge onto US 36
1.2 mi
·
1 min
·
Denver–Boulder Turnpike
9
Keep slight right at fork onto US 36
1.9 mi
·
2 min
·
Denver–Boulder Turnpike
10
Keep slight right at fork onto US 36
2.5 mi
·
2 min
·
Denver–Boulder Turnpike
11
Keep slight right at fork onto US 36
2.0 mi
·
2 min
·
Denver–Boulder Turnpike
Use the straight / slight right lanes.
12
Keep slight right at fork onto US 36
1.1 mi
·
1 min
·
Denver–Boulder Turnpike
Toward I 25: Denver, Fort Collins
Use the straight / slight right lanes.
13
Take the exit
0.5 mi
·
47 sec
Toward I 25 south: Denver
Use the straight / slight right lanes.
14
Continue on I 25
0.4 mi
·
33 sec
·
I 25
Toward I 25 south: Denver
15
Merge onto I 25; US 87
34 mi
·
40 min
·
North Valley Highway
Use the straight / slight right lanes.
16
Take the exit
0.2 mi
·
31 sec
Exit 182
Toward Wilcox Street, Wolfensberger Road
Use the straight / slight right lanes.
17
Turn left onto East Wolfensberger Road
432 ft
·
20 sec
·
East Wolfensberger Road
Use the left / straight / right lanes.
18
Continue on North Wilcox Street
0.4 mi
·
1 min
·
North Wilcox Street
19
Turn left onto 5th Street
0.2 mi
·
37 sec
·
5th Street
Use the left lane.
20
Turn right onto North Cantril Street
0.2 mi
·
28 sec
·
North Cantril Street
21
Arrive at destination
North Cantril Street
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 23 mi from Broomfield, CO · 29m into the drive
Mid-route town
Meal stop
23 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.
Pacing Suggestions
Fuel and coffee
A short stop after about 10 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 23 miles from Broomfield, CO, which is a good place for a longer meal and fuel stop.
Arriving in Castle Rock, CO
Allow a few extra minutes for the final approach into Castle Rock, CO if you are unfamiliar with the area.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$6.93 one way
$13.86 round trip
$3.83/gal
25.4 MPG avg
16 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.05 | $7.34 | $14.68 |
| premium | $4.39 | $7.96 | $15.92 |
| diesel | $5.61 | $10.16 | $20.31 |
Estimated Tolls: $0.61
Denver–Boulder Turnpike
(8.7 mi)
$0.61
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Drive Cost (one way)
Fuel
$7
Tolls
$1
Total
$8
Estimated CO2 emission: 16.1 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $5 in charging · 0 stops · 69% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 13.8 | 0 | $4.83 | $2.21 |
| Efficient EV | 11.5 | 0 | $4.02 | $1.84 |
| EV Truck/SUV | 18.4 | 0 | $6.44 | $2.94 |
Gas CO2
16 kg
EV CO2
5 kg (69% 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.
Destination
Castle Rock, CO
Late night in Castle Rock on Friday
Local time
5:04 AM
MDT
Current temp
73°F
Unavailable
Live forecast
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
58m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Broomfield, CO to Castle Rock, CO covers 46 miles and takes about 58m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are North Valley Highway, Denver–Boulder Turnpike, CO 121. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 23 miles from Broomfield, CO. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $6.93 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This is a short but busy drive. With 16 decision points packed into just 46 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 58m.
The main spots that need attention: near the start (West 3rd Avenue): Complex interchange - multiple decisions in a short stretch; at 0.3 miles: Highway fork - watch signs carefully; at 1 miles: Lane positioning matters here.
On the drive from Broomfield, CO to Castle Rock, CO, road signs begin pointing toward Fort Collins along the way.
How this page is built
Compiled and maintained by the Trip.ovh planning team at COD Solutions Oy (Helsinki). Each route is built from authoritative open government and mapping datasets rather than crowdsourced reviews. Distances and geometry come from OSRM over OpenStreetMap. Fuel cost uses EIA weekly regional averages. Pages are published only after passing our data-quality checks; our methodology page documents refresh cadence, editorial standards, and known limitations.
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