Shortest distance between Castle Rock and Boulder is 49.58 miles (79.79 km).
Flight distance from Castle Rock, CO to Boulder, CO is 49.58 miles. Estimated flight time is 00 hours 06 minutes.
The driving distance from Castle Rock, Colorado to Boulder, Colorado is: 57.34 miles (92.28 km) by car.
Driving from Castle Rock to Boulder will take approximately 01 hours 00 minutes.
The distance between Castle Rock and Boulder is 92 km if you choose to drive by road. You can go 01 hours 01 minutes if you drive your car at an average speed of 90 kilometers / hour. For different choices, please review the avg. speed travel time table on the below.
There is no time difference between Castle Rock and Boulder. The current time is 09:15:05.
|Average Speed||Travel Time|
|30 mph (48.3 km/h)||01 hours 54 minutes|
|40 mph (64.37 km/h)||01 hours 26 minutes|
|50 mph (80.47 km/h)||01 hours 08 minutes|
|60 mph (96.56 km/h)||00 hours 57 minutes|
|70 mph (112.65 km/h)||00 hours 49 minutes|
|75 mph (120.7 km/h)||00 hours 45 minutes|
|80 mph (128.75 km/h)||00 hours 42 minutes|
A car with a fuel efficiency of 8.3 l/100 km will need 7.66 liters (2.02 gallon) of gas to cover the route between Castle Rock and Boulder.
The estimated cost of gas to go from Castle Rock to Boulder is $8.3 (diesel $9.81).
Take a look at our Gas Cost Calculator feature. It will figure out how much it will cost to drive this particular distance.
The average gas price per gallon of daily gas for calculations is $4.102 (Diesel $4.849) /gallon. Last changed prices on June 27, 2022.
The place names are translated into coordinates to approximate the distance between Castle Rock and Boulder (latitude and longitude). Cities, states, and countries each have their own regional center. The Haversine formula is used to measure the radius.