The course is marked with orange and yellow surveyor's ribbon, gypsum chalk, reflective strips, chem lites, and signs. The primary markers are orange surveyor's ribbons from the start to Chambers 2, and then yellow surveyor's ribbons from Chambers 2 to the finish line at Lake Cuyamaca. Runners will wear an orange or yellow wrist band to correlate to the ribbon color they should be following. Orange ribbons/wrist band used from the start to Chambers 2(mile 88.4)and yellow ribbons/wrist band used from Chambers 2 to the finish line. You will exchange your orange wrist band for a yellow one at Chambers 2 Aid Station.
Multiple orange/yellow ribbons are hung prior to major turns. Runners should see confidence ribbons about every 2-3 minutes jogging time. Several ribbons in a row with double orange/yellow ribbons indicate you are appraoching a turn. Pay close attention at all times and do not assume the runner in front of you knows the course or is following it correctly; he or she could take you off course if you mindlessly follow and don't watch for markers yourself, so stay alert.
Several key intersections are also marked with chalk arrows and/or signs. Night time sections will have reflective markers attached to limbs and trail posts. Please review the map and course to familiarize yourself with bi-directional sections of the course (mainly on the PCT and in and out of Chambers aid station).
There are several major road crossings (Sunrise Hwy and Hwy 79) on this course. Use extreme caution when crossing the roads and yield to all traffic!
Sales for a 2017 free entry to SD 100 and numerous other Sponsor Giveaway Gifts. Proceeds support SD Trailfit and Ultra Medics