There is a lot of conflicting information about this variety, which is said to be unstable. From a spontaneous mutation in a Pruden's purple crop. Presented in the 2005 Seed Savers Yearbook by Doroty Beinswenger, without specifying the type of leaves. It is named after the Flathead River in Montana.

Large, orange-yellow beefsteak-like fruit weighing over 300 grams.

Excellent flavour. Leaf type is variable.

Grown in 2016
Comments:
Large, small-stemmed plant with low vigour and regular wispy foliage.
Average season production.
High variability in fruit size.
Good sweet fruity flavour.
No diseases to report.
First fruit: +/- 125 days after sowing - +/-76 days after transplanting.
Average weight: +/- 310 grams.