Headwaters on the Frio Marathon/Half Marathon Share Date 04/07/2018 8:00 am - 11:45 am Location Big Springs Ranch Categories Events Outdoors For more information please call 507-402-3372 or bryce.gaudian@gmail.com Map Loading Map.... Big Springs Ranch10664 US Hwy 83 N - Leakey 29.8290103 -99.67202450000002