"Rogue" squash came up in my garden. Presumably from compost. I don't recognize it at all. Fruit is massive (2 liter soda bottle). Does anyone recognize this?
It could be a kind of Jack O'Lantern pumpkin or cross of one to a summer squash.
It's probably a cross of something, but looks like an immature spaghetti squash to me. If there are others let them fully ripen.
Concur. Very high probability that it is a cross of some kind. Squash are promiscuous. Looks like one parent was a Grey zucchini.