I looked through all of the information on the website and was reassured when I saw you could walk, run, or use a combination to reach the miles. According to the comments the jury is out on whether elliptical counts, so you have to decide for yourself. You also have to option to split the miles various ways as part of a team of 2 or 3. This would be an awesome idea for friends, couples, family members, etc to help motivate each other to move more in the new year. One of my goals/resolutions for 2015 is to up my mileage game and this would certainly be motivation. So I sent this sucker back: I may have made a rash decision but this will be the equivalent for me this year of The Dopey Challenge (since I won’t be there in January) or an Ironman (since I don’t know how to ride a bike… yet.) Up to the challenge? Get all the information & sign up here! Keep it challenging & fierce! -Little Red What are your running goals for 2015? Are you planning to take on this or a similar challenge to help motivate you?