250 (2016 population: 275) is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No.

[2] Arlington Beach House was one of the first hotels built in Saskatchewan and was one of the first buildings constructed along Last Mountain Lake.

It states that after the Great Chief finished building all the hills on the prairies there was left-over dirt, which he used to create Last Mountain.

When the Great Chief of the world completed the building of all the hills, he found he had a little material left over and he looked about to see where he should put it.

He saw that the prairie lay smooth and level and for many days journey, unbroken by mountain, lake, or stream.

he said, and in the midst of the prairie he built a mound with what dirt remained and, scooping a hollow with his hand, he made the water left over from the rivers a long lake.

Then from their ranks steeped Cheewana, daughter of the great chieftain, beautiful as the summer morning, wise as a beaver and she bent at his feet.

The park features access to the bird sanctuary and Last Mountain Lake National Wildlife Area, which is a Ramsar site.

250 is governed by an elected municipal council and an appointed administrator that meets on the second Thursday of every month.