The light skin and delicate nature of Rainiers occasionally leaves light brown spots on the skin. This is not a flaw, but actually an extra-sweet sugar spot.
Rainier cherries typically grow one to two sizes larger than their dark-sweet cherry counterparts.
Rainier cherry trees are often used as a pollenizer for dark-sweet cherry varieties.
The mother tree that produced the first Rainier cherries still grows in Prosser, Washington.
National Rainier Cherry Day is celebrated on July 11 each year.