The Multiday & Ultrarunning Calendar 2015 The Multiday & Ultrarunning Calendar 2015 is a free service. Add your event here. You can also promote your event with banner ads on this site. Click here for more information and prices. Any questions – Contact Us. Get your free online Ultrarunning World magazine I agree to have my personal information transfered to MailChimp ( more information ) Join over 2,000 subscrbers who are receiving the latest Ultrarunning news. Absorb the stories, contribute your experience and advertise your events.We hate spam. Your email address will not be sold or shared with anyone else.