Distance between cities › USA › South Dakota › Marvin, SD › Distance from Marvin to Ralph Book Hotels

Distance from Marvin, SD to Ralph, SD

Distance

349 mi

Time

7 hours 11 mins

Gas Cost

$31 - $60

There are 299.94 miles from Marvin to Ralph in west direction and 349 miles (561.66 kilometers) by car, following the US-12 and SD 20 route.

Marvin and Ralph are 7 hours 11 mins far apart, if you drive non-stop .

This is the fastest route from Marvin, SD to Ralph, SD. The halfway point is Glenham, SD.

Please note the time difference between Marvin, SD and Ralph, SD is 1 hour. The current time in Marvin is 9:52 pm and the current time in Ralph is 8:52 pm.

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Lowest Price Rental Cars in Marvin, SD

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Marvin »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 14.01 gallons of gas to cover the route between Marvin, SD and Ralph, SD.

The estimated cost of gas to go from Marvin to Ralph is $43.39.

During the route, an average car will release 274.52 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 Marvin, SD and Ralph, SD

If you want to meet halfway between Marvin, SD and Ralph, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 45.536137 and -100.174194, or 45º 32' 10.0932" N, 100º 10' 27.0984" W. This location is 174.45 miles away from Marvin, SD and Ralph, SD and it would take approximately 3 hours 35 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Glenham, SD, situated 174 miles from Marvin, SD and 172 miles from Ralph, SD. It would take 3 hours 47 mins to go from Marvin to Glenham and 4 hours 30 mins to go from Ralph to Glenham.