The post office was in a store on the upper reaches of the Rogue River near the mouth of Union Creek on the road to Crater Lake ten miles from the west entrance of the National Park and about twelve miles north of Prospect. The post office and resort took their name from Union Creek which was named for Union Peak in the Park.
Already served by Prospect for half the year, Union Creek's seasonal post office was discontinued April 1945 but it really did not reopen after closing in the fall of 1944.
Where did they go? Following the mail trail of the DPOs of Jackson County, Oregon (SHS 979.5281 S93 2013)