 Elevations around the area range from 780 feet ( 240 m ) above sea level at the mouth of the Okanogan River to 6 @,@ 774 feet ( 2 @,@ 065 m ) above sea level at the Moses Mountain . The average elevation is 843 feet ( 257 m ) above sea level according to the United States Geological Survey ( USGS ) . The Moses Mountain , with a summit , sits east of the city , while Little Moses Mountain , located 5 @,@ 963 feet ( 1 @,@ 818 m ) above sea level , and Omak Mountain , located 5 @,@ 749 feet ( 1 @,@ 752 m ) above sea level , are adjacent to the Moses Mountain . West of the city are the North Cascades , anchored by the Cascade Range . Mountain peaks on the western portion of the Omak area range between 6 @,@ 000 feet ( 1 @,@ 800 m ) and 8 @,@ 000 feet ( 2 @,@ 400 m ) . The Coleman Butte mountain summit — 1 @,@ 450 feet ( 440 m ) above sea level — is located directly adjacent to municipal boundaries . 
