Antelope Island State Park, UT. After 7 years of the Layton Marathon, we were in need of changing the finish location due to all the new construction and homes being built in Layton City. After listening to our runners we decided to have more course on Antelope Island. All courses are 100% on Antelope Island now. The Half Marathon will start near Garr Fielding Ranch (where the Layton Marathon used to start) and run the island and finish at the Marina. To see all the new courses check out the course pages of the website. The Marathon will not be a bused out start but an out-and-back on the Half Marathon course.