Spanning 92.7 miles through the Colorado Mountain West, this trip from Boulder to Black Forest is a straightforward journey typically taking about 1 hour and 51 minutes. Because of the manageable duration, it works perfectly as a single-day excursion, allowing you to reach your destination without the need for an overnight stay. You should budget approximately $14 for fuel to cover the distance. The route relies on a combination of the North Valley Highway, the Denver–Boulder Turnpike, and Shoup Road to transition from the northern front range area down toward the Black Forest. It is a practical drive that favors efficiency, making it an ideal choice for travelers looking to navigate between these two points with minimal fuss. Expect a functional trip that prioritizes moving you reliably between regions.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
46.4 miles from Boulder, CO
A natural place for your longest stop of the day
, about 54m into the drive
.
Main Roads
Road
Distance
Duration
North Valley Highway
63 mi
1h 9m
Denver–Boulder Turnpike
19.7 mi
23m
Shoup Road
4.3 mi
7m
Interquest Parkway
2.8 mi
4m
28th Street
0.8 mi
1m
Arapahoe Avenue
0.6 mi
1m
I 25
0.4 mi
<1m
19th Street
<0.1 mi
<1m
Longest stretch:
North Valley Highway
— 63 mi, about 1h 9m
Turn-by-Turn Driving Directions
Step-by-step road directions between Boulder, CO and Black Forest, CO.
1
Start on this road
87 ft·6 sec·this road
2
Turn right onto 19th Street
143 ft·13 sec·19th Street
3
Turn left onto Arapahoe Avenue
0.6 mi·1 min·Arapahoe Avenue
Use the left / straight / right lanes.
4
Turn right onto US 36
0.8 mi·1 min·28th Street
5
Turn straight onto US 36
3.4 mi·4 min·Denver–Boulder Turnpike
Use the straight / slight right lanes.
6
Keep slight right at fork onto US 36
1.7 mi·1 min·Denver–Boulder Turnpike
7
Keep slight right at fork onto US 36
2.6 mi·3 min·Denver–Boulder Turnpike
8
Keep slight right at fork onto US 36
2.4 mi·2 min·Denver–Boulder Turnpike
9
Keep slight right at fork onto US 36
2.2 mi·2 min·Denver–Boulder Turnpike
10
Keep slight right at fork onto US 36
1.9 mi·2 min·Denver–Boulder Turnpike
11
Keep slight right at fork onto US 36
2.5 mi·2 min·Denver–Boulder Turnpike
12
Keep slight right at fork onto US 36
2.0 mi·2 min·Denver–Boulder Turnpike
Use the straight / slight right lanes.
13
Keep slight right at fork onto US 36
1.1 mi·1 min·Denver–Boulder Turnpike
Toward I 25: Denver, Fort CollinsUse the straight / slight right lanes.
14
Take the exit
0.5 mi·47 sec
Toward I 25 south: DenverUse the straight / slight right lanes.
15
Continue on I 25
0.4 mi·33 sec·I 25
Toward I 25 south: Denver
16
Merge onto I 25; US 87
63 mi·1 hr 9 min·North Valley Highway
Use the straight / slight right lanes.
17
Take the exit
0.7 mi·1 min
Exit 153Toward Interquest ParkwayUse the right lane.
18
Continue on Interquest Parkway
2.8 mi·4 min·Interquest Parkway
Use the left lane.
19
Turn right onto Shoup Road
4.3 mi·7 min·Shoup Road
20
Turn left onto CR 189
82 ft·1 sec·Black Forest Road
21
Arrive at destination
CR 189
Trip Plan
Since this is a relatively short trip, you have plenty of flexibility in your scheduling, though leaving during off-peak hours can help you avoid congestion common on major thoroughfares. Because there are no mandatory stops scheduled for this 92.7-mile route, you can easily complete the drive in one go without needing to plan for lengthy breaks. Keep in mind that the transition from the North Valley Highway to Shoup Road is where the drive becomes more localized, so keep your navigation handy during the final miles. Given the $14 fuel estimate, filling up before you leave Boulder ensures you won't have to worry about finding a station while navigating the turn-heavy sections near Black Forest. Use this freedom to tailor your departure time to suit your personal preferences.
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.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 46.4 miles from Boulder, CO, or about 54m into the drive.
The longest continuous stretch on this route runs about 63 miles.
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 20 miles or 25m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 46.4 miles or 54m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 27m
Traffic, exits, and arrival timing usually matter more near Black Forest, CO than in the middle of the route.
Before You Leave
+
Open the route before leaving Boulder, CO so your first major turns are already loaded.
Day 1
Settle into the route from Boulder, CO
This is one driving day of about 92.7 miles and 1h 51m.
Your first comfortable stop window is around 20 miles from Boulder, CO.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on North Valley Highway for about 63 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 16
5 decision points cluster between mile 0 and 85 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
0 mi into trip|~0m in|Arapahoe Avenue
Turn left onto Arapahoe Avenue
Lane positioning matters here
Use the left / straight / right lanes.
6
18 mi into trip|~22m in|US 36 / Denver–Boulder Turnpike
Keep slight right at fork onto US 36 / Denver–Boulder Turnpike
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
8
20 mi into trip|~25m 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
6
21.1 mi into trip|~26m in
Take the exit toward I 25 south: Denver
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 25 south: Denver
7
85 mi into trip|~1h 37m in
Take the exit toward Interquest Parkway
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the right lane.
Exit 153
Toward Interquest Parkway
Fuel & Cost
Regular Gas
$13.97 one way
$27.93 round trip
$3.83/gal25.4 MPG avg32 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.05
$14.79
$29.58
premium
$4.39
$16.04
$32.07
diesel
$5.61
$20.47
$40.93
Estimated Tolls: $1.38
Denver–Boulder Turnpike
(19.7 mi)$1.38
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
$14
Tolls
$1
Meals
$25–$50
Total
$40–$65
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 32.4 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $10 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
27.8
0
$9.73
$4.45
Efficient EV
23.2
0
$8.11
$3.71
EV Truck/SUV
37.1
0
$12.98
$5.93
Gas CO2
32 kg
EV CO2
11 kg (66% 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 15, 2026
Origin
Boulder, CO
Late night
in Boulder on Sunday
Local time
1:54 AM
MDT
Current temp
72°F
Unavailable
Live forecast
Destination
Black Forest, CO
Late night
in Black Forest on Sunday
Local time
1:54 AM
MDT
Current temp
42°F
Unavailable
Live forecast
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
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
30 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
1h 51m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
Florissant Fossil Beds National Monument
National Monument
Beneath a grassy mountain valley in central Colorado lies one of the richest and most diverse fossil deposits in the world. Petrified redwood stumps up to 14 feet wide and thousands of detailed fossil...
25 mi from route
~63 min detour
$10
near mile 79.9
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is best described as a turn-heavy local experience that shifts gears as you progress. You will spend about 25% of your time on highways, with a significant 63-mile stretch along the North Valley Highway serving as the longest uninterrupted portion of your trip. While the highway segments offer a faster pace, the character of the road changes once you transition toward the local roads near your destination. Be prepared for a more technical driving feel as you navigate the turns that define the final approach. It is not an endless interstate grind; rather, it is a balanced mix that requires you to stay alert as the terrain and road types fluctuate throughout the 1 hour and 51 minutes behind the wheel.
Only 25% highway — the rest is turn-by-turn surface driving.
21 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 63 mi on North Valley Highway.
How Hard Is This Drive?
8/10
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 Arapahoe Avenue.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 92.7 miles you will encounter 16 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: near the start (Arapahoe Avenue): Lane positioning matters here; at 18 miles (US 36 / Denver–Boulder Turnpike): Highway fork - watch signs carefully. Lane positioning matters here; at 20 miles (US 36 / Denver–Boulder Turnpike): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
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 Boulder, CO to Black Forest, CO, road signs begin pointing toward Fort Collins along the way.
Fort Collins
20 mi in|~25m|via US 36
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 1h 51m. Total distance: 92.7 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 51m drive, comfortable solo distance.
Scenic Drive
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 63 miles on North Valley Highway. The full list of main roads is in the Roads section above.
Expect about $1.38 in tolls one way, starting with Denver–Boulder Turnpike. Most Northeast and Midwest toll agencies accept E-ZPass; in the West and Texas, transponders like TxTag or FasTrak apply. If you do not have a transponder, cashless tolling plates will mail a bill to the vehicle's registered address — usually with a surcharge, so a rental-car toll pass is often cheaper than paying by mail.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Black Forest, CO before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
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 (Arapahoe Avenue): Lane positioning matters here; at 18 miles (US 36 / Denver–Boulder Turnpike): Highway fork - watch signs carefully. Lane positioning matters here; at 20 miles (US 36 / Denver–Boulder Turnpike): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Florissant Fossil Beds National Monument. See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at Black Forest, CO before heading back.
