Both Irvine Park & Santiago Oaks Park are featured in the 10k event which takes place in two of the most beautiful parks in Orange County. This trail race will challenge the best of the best as runners enter the interconnecting trail system of both Irvine Regional & Santiago Oaks Park. The 5k in Irvine Regional offers a flat but challenging rugged sandy, gravel terrain. The beautiful majestic oaks and sandy marsh like single tracks are spectacularly breathtaking and truly a unique experience.