How far is Penrose, CO from Boulder, CO?
The driving distance from Penrose, CO to Boulder, CO is about 134 miles (215.6 km), with a travel time of about 02h 24m by car.
- The straight-line flight distance is about 110.7 miles (178.1 km).
- For a round trip, plan for roughly 04h 48m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MDT.
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 02h 24m.
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.
Human settlement in Douglas County, Colorado, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Penrose and Boulder.
Turn-by-Turn Driving Directions
Step-by-step road directions between Penrose and Boulder.
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1
Start on Grant Street
927 ft · 46 sec · Grant Street
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2
Turn left onto 4th Avenue
778 ft · 40 sec · 4th Avenue
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3
Turn sharp right
32 mi · 43 min
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4
Turn left onto I 25 North, US 24 West: Denver
609 ft · 14 sec
-
5
Take the ramp straight toward I 25 North, US 24 West: Denver
1448 ft · 35 sec
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6
Merge slight left onto Monument Valley Freeway
7.7 mi · 9 min · Monument Valley Freeway
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7
Continue on Ronald Reagan Highway
68.6 mi · 1 hr 16 min · Ronald Reagan Highway
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8
Take the exit slight left toward US 36 West: Westminster, Boulder
2930 ft · 52 sec
-
9
Merge slight right onto Denver–Boulder Turnpike
2.1 mi · 2 min · Denver–Boulder Turnpike
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10
Keep slight right to continue on Denver–Boulder Turnpike
1.7 mi · 2 min · Denver–Boulder Turnpike
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11
Keep slight right to continue on Denver–Boulder Turnpike
2.3 mi · 3 min · Denver–Boulder Turnpike
-
12
Keep slight right to continue on Denver–Boulder Turnpike
1.9 mi · 2 min · Denver–Boulder Turnpike
-
13
Keep slight right to continue on Denver–Boulder Turnpike
2.1 mi · 2 min · Denver–Boulder Turnpike
-
14
Keep slight right to continue on Denver–Boulder Turnpike
2.9 mi · 3 min · Denver–Boulder Turnpike
-
15
Keep slight right to continue on Denver–Boulder Turnpike
2.4 mi · 3 min · Denver–Boulder Turnpike
-
16
Keep slight right to continue on Denver–Boulder Turnpike
2.2 mi · 3 min · Denver–Boulder Turnpike
-
17
Keep slight left to continue on Denver–Boulder Turnpike
2.3 mi · 3 min · Denver–Boulder Turnpike
-
18
Continue on 28th Street
1.2 km · 2 min · 28th Street
-
19
Turn left onto Arapahoe Avenue
1 km · 2 min · Arapahoe Avenue
-
20
Turn right onto 19th Street
44 m · 11 sec · 19th Street
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21
Turn left
27 m · 5 sec
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22
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Penrose and Boulder.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Ronald Reagan Highway
Continue on Ronald Reagan Highway
68.6 mi · 01h 16m
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.
Mostly Clear leaving Penrose and Mostly Sunny near Boulder.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Penrose to Boulder?
The road trip is about 134 miles (215.6 km) and usually takes 02h 24m 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?
Larkspur is a useful midpoint, sitting about 65.5 miles from Penrose and 68.5 miles from Boulder.
How much longer is the road route than the straight-line distance?
The direct path is about 110.7 miles (178.1 km), while the road route adds roughly 23.3 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 MDT. If you want a more comfortable same-day return, try to leave by 1:42 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $17.49 one way or $34.98 round trip. Estimated CO2 is about 42 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Clear around Penrose and Mostly Sunny near Boulder.
Stop Ideas Near Larkspur
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 Larkspur.
Colorado Springs, Colorado
Pine Junction, CO
Denver (Bus Station), Colorado
Union Station
Flight Path Map
This map shows the direct air route between Penrose and Boulder. Straight-line distance: 110.65 mi (178.08 km).
#1 Penrose
Place in Colorado, USA
| Population | 3,582 |
| Coordinates | 38.4250000, -105.0227600 |
| Altitude | 1626 |
| Country | United States |
#2 Boulder
The most populous city in Boulder County, Colorado.
| Population | 107,645 |
| Coordinates | 40.0149900, -105.2705500 |
| Altitude | 1624 |
| Country | United States |
End: (-105.27055, 40.014996)
Estimated Travel Time
Distance: 216 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 27m |
| 40 mph (64.37 km/h) | 03h 20m |
| 50 mph (80.47 km/h) | 02h 40m |
| 60 mph (96.56 km/h) | 02h 13m |
| 70 mph (112.65 km/h) | 01h 54m |
| 80 mph (129 km/h) | 01h 40m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.70 | $17.49 | $34.98 |
| Mid-grade | $4.08 | $19.32 | $38.63 |
| Premium | $4.39 | $20.77 | $41.54 |
| Diesel | $4.74 | $22.41 | $44.81 |
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 · May 16, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.