Well I did it! I paid the registration and signed up for the Deadwood/mickelson trail 1/2 marathon on June 7th.

I have quite a few friends who have done it and it is beginner/walker friendly. I rode my bike on the "big Mick" a couple of summers ago and loved it so i thought it would be a fun place to start.
It is a "rails to trails" project and the 1/2 is a 3% grade downhill so not too grueling

Here is the website if you want to check out the pics (or register

www.deadwoodmickelsontrailmarathon.com