Is the bone marrow located in epiphysis?

No, the bone marrow is not located in the epiphysis.

The bone marrow is the soft tissue that fills the cavity of the long bones and the cancellous bone of other bones. It is composed of hematopoietic tissue, which produces blood cells, and stromal tissue, which supports the hematopoietic cells.

The epiphysis is the rounded end of a long bone. It is covered by articular cartilage and is involved in the formation of joints. The epiphysis is not filled with bone marrow.