How far is Castle Rock, CO from Longmont, CO?
Distance by Flight
Shortest distance between Castle Rock and Longmont is 56.46 miles (90.86 km).
Flight distance from Castle Rock, CO to Longmont, CO is 56.46 miles. Estimated flight time is 00 hours 09 minutes.
It takes 00 hours 08 minutes to travel from Castle Rock to Longmont with an airplane (average speed of 550 miles).
Driving distance
The driving distance from Castle Rock, Colorado to Longmont, Colorado is: 78.8 miles (126.81 km) by car.
Driving from Castle Rock to Longmont will take approximately 01 hours 14 minutes.
#1 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 |
#2 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 |
Ending point in Longmont: (-105.101861,40.16721)
Estimated Travel Time Between Castle Rock and Longmont
The distance between Castle Rock and Longmont 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 Castle Rock and Longmont. The current time is 04:53:58.
| Average Speed | Travel Time |
|---|---|
| 30 mph (48.3 km/h) | 02 hours 37 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 18 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 58 minutes |
Gas Consumption
A car with a fuel efficiency of 8.3 l/100 km will need 10.53 liters (2.78 gallon) of gas to cover the route between Castle Rock and Longmont.
The estimated cost of gas to go from Castle Rock to Longmont is $10.12 (diesel $13.17).
Colorado gas prices.
| Gasoline | Mid Grade | Premium | Diesel | |
|---|---|---|---|---|
| Gallon | $3.64 | $4.03 | $4.33 | $4.74 |
| Total | $10.12 | $11.21 | $12.03 | $13.17 |
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 December 22, 2024.
How did we calculate the distance?
The place names are translated into coordinates to approximate the distance between Castle Rock and Longmont (latitude and longitude). Cities, states, and countries each have their own regional center. The Haversine formula is used to measure the radius.
