The Shamrock 'n Run in Anaheim, Orange, offers athletes a choice between a competitive 5K or 2K run, drawing participants from across the Placentia-Yorba Linda community. The race has a proud legacy of supporting local student programs and brings together thousands eager to challenge themselves on a course designed for runners of all levels. Athletes are encouraged to run alongside their four-legged training partners—dogs are welcome on both the 5K and 2K courses, with the usual park rules: leashes required, doggie bags in hand, and well-behaved companions.