Teresa passed unexpectedly February 4, 2026, in Tonasket due to a long-term illness.

Teresa was born on August 4, 1970, to parents Bud and Shirley Gerken and was the youngest and only girl of the 3 children. She graduated from Oroville High School in 1988 and never ventured far from the Okanogan Valley that she called home her entire life.

It was here she met her life partner Tim Casey and his son Austin. Together, they worked and lived happily in their home just south of Tonasket.

Sis loved animals, growing flowers, cooking and taking care of Tim, Austin and her family.

Many happy times were spent at large family gatherings of both sets of parents, Ray and Helen and Bud and Shirley. There were many memorable moments spent at the family cabin at Bonaparte Lake as well as camping trips to Toats Coulee. She loved her time at the family cabin.

Teresa was proceeded in death by parents Bud and Shirley. She is survived by partner Tim Casey, and son Austin Casey, Brothers Ted Gerken (Tammy), Tom Gerken (Shelly). Nieces (Hayley, Tayler), Nephew (Tanner) and great niece Lilly.

A Celebration of Life for Teresa will be held at the Tonasket Eagles March 13th at 11:00 AM.