Gird your loins, it’s time for the Girdwood Marathon. OCTOBER 1st, 9:00AM for Full Marathon,and 10:00AM for Half Marathon. Choose the full 26.2 (ish) mile marathon or 13.1 (ish) mile half-marathon. The race starts and ends in Girdwood. The course takes you through town, along the Bird to Gird trail, into the mountains rich with autumn colors, and views of snow-dusted peaks.