Elevation gain of 515 feet. Starting at 0.90 miles until we reached 1.29 miles was rated a Category 5 climb 3.2% grade - These rated climbs are the least difficult of all the categorized climbs. The exactly same methodology is used in determining their difficulty as Cat 4 climbs but they the least difficult of all the rated climbs. All climb scores are based on distance, grade/elevation change, and maximum elevation. But from 1.46 to 2.53 miles it jumped to a category 4 climb 7.3% grade.