Distance between cities › USA › South Dakota › Custer, SD › Distance from Custer to Keystone Book Hotels

Distance from Custer, SD to Keystone, SD

Distance

26 mi

Time

40 minutes

Gas Cost

$2 - $4

There are 12.67 miles from Custer to Keystone in northeast direction and 26 miles (41.84 kilometers) by car, following the US-16 and US-385 route.

Custer and Keystone are 40 minutes far apart, if you drive non-stop .

This is the fastest route from Custer, SD to Keystone, SD.

Custer, SD and Keystone, SD are in the same time zone (MDT). Current time in both locations is 3:58 pm.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Keystone, SD? Here there are some offers to rent a car in Custer, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Custer »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 1.04 gallons of gas to cover the route between Custer, SD and Keystone, SD.

The estimated cost of gas to go from Custer to Keystone is $3.23.

During the route, an average car will release 20.42 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.10 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Custer, SD and Keystone, SD

If you want to meet halfway between Custer, SD and Keystone, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.894245 and -103.569611, or 43º 53' 39.282" N, 103º 34' 10.5996" W. This location is 12.98 miles away from Custer, SD and Keystone, SD and it would take approximately 20 minutes to reach the halfway point from both locations.