Another total knee replacement hiker here! In the interest of saving space I'll post the link to my entry in the "Knee Pain" thread here. Check the link to before and after x-rays below.
Since the surgery and rehab I've done the Wild River Wilderness loop, Carter Dome, The Imp face loop, Edmunds Path just to 4000', and Pleasant Mt. 6 times (trailhead is 1 mile from my home.). Before the surgery the 1/4mile walk from my car to my office was a struggle!
I know how I feel to be able to be active again (and the hard work rehab from this surgery is) so from one TKR to another. CONGRATS!