Distance between cities › USA › Idaho › Tensed, ID › Distance from Tensed to Keystone Book Hotels

Distance from Tensed, ID to Keystone, SD

Distance

893 mi

Time

15 hours 49 mins

Gas Cost

$83 - $162

There are 690.40 miles from Tensed to Keystone in southeast direction and 893 miles (1,437.14 kilometers) by car, following the I-90 route.

Tensed and Keystone are 15 hours 49 mins far apart, if you drive non-stop .

This is the fastest route from Tensed, ID to Keystone, SD. The halfway point is Big Timber, MT.

Please note the time difference between Tensed, ID and Keystone, SD is 1 hour. The current time in Tensed is 11:14 am and the current time in Keystone is 12:14 pm.

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Lowest Price Rental Cars in Tensed, ID

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Tensed »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 35.85 gallons of gas to cover the route between Tensed, ID and Keystone, SD.

The estimated cost of gas to go from Tensed to Keystone is $116.95.

During the route, an average car will release 702.41 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 $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Tensed, ID and Keystone, SD

If you want to meet halfway between Tensed, ID 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 45.788216 and -110.020126, or 45º 47' 17.5776" N, 110º 1' 12.4536" W. This location is 446.36 miles away from Tensed, ID and Keystone, SD and it would take approximately 7 hours 54 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Big Timber, MT, situated 474 miles from Tensed, ID and 475 miles from Keystone, SD. It would take 6 hours 47 mins to go from Tensed to Big Timber and 7 hours 23 mins to go from Keystone to Big Timber.