More: Both dogs lived a long time: Baxter 13.3 years and Chipper 16.7 years. Both dogs loved climbing and hiking in the mountains of Washington State. Baxter went on an estimated 756 hikes, he summited 390 times on 63 different summits ranging in elevation from 1,454 ft to 10,138 ft. Chipper did 894 hikes, summited 472 times on 67 different summits.