Post Falls is located four miles (6.4 km) east of the Washington-Idaho border along Interstate 90 in Kootenai County. It is bounded by Coeur d’Alene to the east, the state of Washington to the west, the Spokane River to the south and the Rathdrum prairie to the north. Post Falls is 20 miles (32 km) east of Spokane and approximately 100 miles (160 km) south of the Canada–United States border. The elevation of the city is 2,182 feet (665 m) above sea level.
With its natural beauty and rich history, Post Falls is a must-see stop on the highway to adventure in North Idaho. It’s located just off I-90, between Spokane and Coeur d’Alene, and “Idaho’s River City” is simply brimming with outdoor recreational fun! Enjoy the family friendly and accessible Falls Park, with picnic areas, paved trails and a viewing platform above the roaring falls.
Nearby is the beautiful 78-acre Q’emiln Park on the Spokane River, with a public beach and picnic areas, plus it has 12 connected trails winding along the riverbanks. The park also includes natural rock-climbing walls and 100-plus routes (many with geocaching sites). Festivals, ceremonies, outdoor events – it’s all here in Post Falls.
Source:
https://en.wikipedia.org/wiki/Post_Falls,_Idaho
http://visitnorthidaho.com/community/post-falls-idaho/