My shoes are good for a few more months. I haven't ran yet this week. I'm taking a bit of a break. But I do plan on getting some run and walk time in. I have family in town so my schedule is a little off. I did get ski yesterday so I got some excercise

A good indicator for me would be:

1) how well you've worn your treads of your shoes out
2) how your shins feel when you run
3) if you only use your running shoes for running

I have a pair of "running" shoes that are only used as running shoes. That way I can easily track their wear. Plus walking in running shoes wears them out in a different way and the actual sole can lose it's shape and comfort. Think about how you walk, and then think about how your run. You are putting more emphasis on your heel when you walk and typically need more side support...running shoes allow you to impact the pavement different using the cushion of your foot and having more give on the sides as your foot impacts the road. So with that said, it's also important you don't tie your shoes too tight when you run. You want your foot to be able to expand as it hits the pavement.

When you run, if you feel dull aches in your shins or in your calves, it's time to replace your shoes. Don't wait for the problem to get better on it's own. That is your body telling you the shoes need to go. They are no longer supporting you the way you need to be supported when you run.

Hope you had a good ski ride. It is hard to run & keep up with skiing. It wears my legs out!!

I found that I ski a lot better if I don't go running before I go ski. I have more energy to play around