How far is Longmont, CO from Castle Rock, CO?

Distance by Flight

Shortest distance between Longmont and Castle Rock is 56.46 miles (90.86 km).

Flight distance from Longmont, CO to Castle Rock, CO is 56.46 miles. Estimated flight time is 00 hours 09 minutes.

It takes 00 hours 08 minutes to travel from Longmont to Castle Rock with an airplane (average speed of 550 miles).

Driving distance

The driving distance from Longmont, Colorado to Castle Rock, Colorado is: 79.12 miles (127.33 km) by car.

Driving from Longmont to Castle Rock will take approximately 01 hours 15 minutes.

Castle Rock image
#1 Longmont

The most populous city in Boulder County, Colorado. It is located in the northern part of the county. Longmont is known for its many parks and green spaces, its many historical sites, and its many attractions, such as the Longmont Museum and the Longmont Civic Center.

Population 98445
GPS Coordinates 40°10'2"N 105°6'7"W
Latitude 40.1672100
Longitude -105.1019300
Altitude 1519
Country United States
Castle Rock image
#2 Castle Rock

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.

Population 70567
GPS Coordinates 39°22'20"N 104°51'22"W
Latitude 39.3722100
Longitude -104.8560900
Altitude 1897
Country United States

Estimated Travel Time Between Longmont and Castle Rock

The distance between Longmont and Castle Rock is 127 km if you choose to drive by road. You can go 01 hours 24 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 Longmont and Castle Rock. The current time is 18:20:54.

Average Speed Travel Time
30 mph (48.3 km/h) 02 hours 38 minutes
40 mph (64.37 km/h) 01 hours 58 minutes
50 mph (80.47 km/h) 01 hours 34 minutes
60 mph (96.56 km/h) 01 hours 19 minutes
70 mph (112.65 km/h) 01 hours 07 minutes
75 mph (120.7 km/h) 01 hours 03 minutes
80 mph (128.75 km/h) 00 hours 59 minutes

Gas Consumption

A car with a fuel efficiency of 8.3 l/100 km will need 10.57 liters (2.79 gallon) of gas to cover the route between Longmont and Castle Rock.
The estimated cost of gas to go from Longmont to Castle Rock is $10.16 (diesel $13.22).

Colorado gas prices.

Gasoline Mid Grade Premium Diesel
Gallon $3.64 $4.03 $4.33 $4.74
Total $10.16 $11.25 $12.08 $13.22

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 $3.640 (Diesel $4.737) /gallon. Last changed prices on November 12, 2024.

How did we calculate the distance?

The place names are translated into coordinates to approximate the distance between Longmont 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.

Distance to Other Cities

Castle Rock image

Driving distance from Arvada, CO to Longmont 36.73 miles (59 km)

Castle Rock image

Driving distance from Aurora, CO to Longmont 49.54 miles (80 km)

Driving distance from Broomfield, CO to Longmont 17.7 miles (28 km)

Castle Rock image

Driving distance from Centennial, CO to Longmont 51.37 miles (83 km)

Castle Rock image

Driving distance from Colorado Springs, CO to Longmont 119.19 miles (192 km)

Castle Rock image

Driving distance from Commerce City, CO to Longmont 34.34 miles (55 km)

Castle Rock image

Driving distance from Denver, CO to Longmont 36.64 miles (59 km)

Castle Rock image

Driving distance from Grand Junction, CO to Longmont 276.31 miles (445 km)

Castle Rock image

Driving distance from Lakewood, CO to Longmont 43.12 miles (69 km)

Castle Rock image

Driving distance from Parker, CO to Longmont 63.29 miles (102 km)

Castle Rock image

Driving distance from Pueblo, CO to Longmont 162.73 miles (262 km)

Castle Rock image

Driving distance from Thornton, CO to Longmont 28.41 miles (46 km)

Gas Cost Calculator