Union County is one of the 36 counties in the U.S. state of Oregon. As of the 2010 census, the population was 25,748. Its county seat is La Grande.Union County comprises the La Grande, OR Micropolitan Statistical Area. It is one of the eight counties of eastern Oregon.

Baker City is a city in and the county seat of Baker County, Oregon, United States. It was named after Edward D. Baker, the only U.S. Senator ever killed in military combat. The population was 9,828 at the time of the 2010 census.

McCall is a resort town on the western edge of Valley County, Idaho, United States. Named after its founder, Tom McCall, it is situated on the southern shore of Payette Lake, near the center of the Payette National Forest. The population was 2,991 as of the 2010 census, up from 2,084 in 2000.Originally a logging community whose last sawmill closed in 1977, McCall is now an all-season tourist destination for outdoor recreation. The resort town is known for its Winter Carnival, extended winters, and one of the highest average snowfalls in the state.

Walla Walla is the largest city and county seat of Walla Walla County, Washington, United States. It had a population of 31,731 at the 2010 census, estimated to have increased to 32,900 as of 2019. The population of the city and its two suburbs, the town of College Place and unincorporated Walla Walla East, is about 45,000.Walla Walla is in the southeastern region of Washington, approximately four hours away from Portland, Oregon, and four and half hours from Seattle. It is located only 6 mi (10 km) north of the Oregon border.