I want to upgrade os x 10.8

so am I limited to 10.11? since my early 2009 iMac (*g ram, 640gHD)will not support 10.12.

From reading the 10.11 threads, I think, if the above answer is yes, I will stay with 10.8. Or is 10.10, 10.9 still available somewhere?

Thanks,
Ken