What Color was the Bear Spotted by Mr. Brown on His Morning Walk?

[Ackbach]

Here is this week's POTW (sorry about its being late - it's crazy at home!):

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One morning Mr. Brown left his tent and walked one mile south. Then he turned east and continued for the second mile. At this point he turned north, walked for another mile, and arrived right back at his tent. While he was out walking, Mr. Brown saw a bear. What color was it?

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[Ackbach]

Congratulations to MarkFL for his correct solution, which I provide below:

Spoiler

The only place on Earth where one can walk x distance south, then x distance east, then x distance north and arrive back at the starting position is the geographic north pole. Because 1 mile is sufficiently short that he never left the Arctic sea ice, the bear must have been a polar bear, and hence was white.