Shortest distance between Boulder and Castle Rock is 49.58 miles (79.79 km).
Flight distance from Boulder, CO to Castle Rock, CO is 49.58 miles. Estimated flight time is 00 hours 06 minutes.
The driving distance from Boulder, Colorado to Castle Rock, Colorado is: 57.25 miles (92.14 km) by car.
Driving from Boulder to Castle Rock will take approximately 01 hours 00 minutes.
The most populous city in Boulder County, Colorado. It is located in the foothills of the Rocky Mountains. Boulder is known for its many colleges and universities, its many parks and green spaces, and its many attractions, such as the University of Colorado Boulder and the Boulder Creek Path.
|GPS Coordinates||40°0'54"N 105°16'14"W|
The most populous city in Douglas County, Colorado. It is located on the South Platte River in the Denver metropolitan area. Castle Rock is known for its many parks and green spaces, its many historical sites, and its many attractions, such as the Castle Rock Historical Museum and the Castle Rock Center for the Arts.
|GPS Coordinates||39°22'20"N 104°51'22"W|
The distance between Boulder and Castle Rock 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 Boulder and Castle Rock. The current time is 23:17:36.
|Average Speed||Travel Time|
|30 mph (48.3 km/h)||01 hours 54 minutes|
|40 mph (64.37 km/h)||01 hours 25 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 7.65 liters (2.02 gallon) of gas to cover the route between Boulder and Castle Rock.
The estimated cost of gas to go from Boulder to Castle Rock is $7.96 (diesel $9.04).
Colorado gas prices.
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 (in Colorado ) per gallon of daily gas for calculations is $3.938 (Diesel $4.477) /gallon. Last changed prices on September 26, 2023.
The place names are translated into coordinates to approximate the distance between Boulder and Castle Rock (latitude and longitude). Cities, states, and countries each have their own regional center. The Haversine formula is used to measure the radius.