Consider yourself physically fit? Put yourself to the test with the most challenging event of Loop the Lagoon. Race through this all-terrain course to the tower at the top of the hill. The 10k Tower Challenge starts with the first half of the 5K course, then has a gain/descent of 730 feet with a finish on the second half of the 5K course.   It is suggest for ages 13+. This event kicks off at 8:00 AM.