Spent last week at Rancho Mira Sol in Durango, Colorado. Elevation was 6500 feet. Ran 6 straight days (total of 16 miles) including a "long" run of 3.75 miles. One morning when I started there were 7 mule deer in the front yard! On another morning I saw fresh bear tracks (mother and cub) which made me decide to turn around quickly and head home... No hip pain at all, just a little tightness on occasion. Non affected knee has been a little sore, but am working on strengthening area around it. Still a long way from where I was before hip surgery, but am heading in the right direction.