Legendary Laurentian AdventurePosted: Tuesday, 22 July 2014 08:47 | By: Henry Djerlev SATURDAY, SEPTEMBER 20TH, 2014 - 50 miles multi-surface "gravel" event utilizing gravel roads, snowmobile trails, ski trails & Mesabi Bike Trail. Cross bike tires of 33mm & larger recommended http://www.giantsridge.com/summer-activities-biking.html Link to "The Legendary Laurentian Adventure" Facebook page.