If you ever decide to roof and to add platforms, raised rocks or a few tons of sand, you will feel as though God has touched your run and deemed it worthy...such a lot of work, but from that point onward, you will laugh at mud season.
For the time being straw, shavings, almost anything will help. Bring in a few stepping stones. But the cadillac of runs has a platform outside the pop door, and your hens will do the bird dance for you!
https://www.backyardchickens.com/web/viewblog.php?id=7693-LynnePs_Run
For the time being straw, shavings, almost anything will help. Bring in a few stepping stones. But the cadillac of runs has a platform outside the pop door, and your hens will do the bird dance for you!

https://www.backyardchickens.com/web/viewblog.php?id=7693-LynnePs_Run