Skinny Raven is actually a sports shop but they are also the hosts of most of the Anchorage area's 5 and 10K runs. You can walk, run, even push a stroller, we just like to get outside. They have runs year round except for a couple of months.
Do something different and enjoy the festivities. People are happy and friendly. You don't have to run, but if you do, they will also record your time and post it online for you to see later. Some of the runs end in a beer afterwards!
Register online and pick up the day of. Register early as it gets more expensive the longer you wait.