 According to the Lieutenant Governor of Washington , Omak is a sister municipality with Summerland , British Columbia , a district with a population of 11 @,@ 280 people according to the 2011 Canadian census . Located on Okanagan Lake in the adjacent Okanagan @-@ Similkameen Regional District , Summerland was incorporated in December 21 , 1906 , and is located 96 miles ( 154 km ) north of Omak . An agricultural community like Omak , Summerland comprises several trails for hiking , walking or cycling . 
