Blue Loop is the longest of the trails in McAllister Park. It is pretty worn in and really does not present any technical challenges.
At this point, it is more for speed and the Strava warriors than it is a technical trail. There is one climb on the loop that if you are traveling counterclockwise you'll encounter after the entrance to Mud Creek Loop; that is the sole reason I rated it Easy/Intermediate. Otherwise, it's an easy trail and could easily be accomplished on a 'New Road' bike such as the Cannondale Slate.