Wildflower Triathlon
The Woodstock of triathlon -- a legendary festival-style race at Lake San Antonio.
Lake San Antonio, California
Early May
113.1 km
1,600 m (bike)
~3,000 athletes
Race Disciplines
Course Highlights
- Lake San Antonio swim
- Nasty Grade climb on the bike
- 5,000+ feet of bike climbing
- Festival camping and community atmosphere
- Oak-studded California hill country scenery
The Course
The Wildflower Triathlon begins with a swim in Lake San Antonio, a large reservoir in the rolling hills of California's Central Coast. The freshwater swim can feature varying visibility and water temperatures depending on conditions, and the lake's size means surface chop is possible.
The 56-mile bike course is legendary for its difficulty. Rolling through the oak-studded hills surrounding the lake, the course features over 5,000 feet of climbing, including the infamous Nasty Grade, a punishing climb that arrives around mile 25. The terrain is relentless, with virtually no flat stretches, and the May heat can add an extra layer of difficulty. This is widely considered one of the toughest half-distance bike courses in triathlon.
The 13.1-mile run continues the theme of relentless terrain, with a hilly out-and-back course through the campground area and surrounding hills. The combination of the demanding bike and hilly run makes Wildflower a true test of all-around triathlon fitness. The festival atmosphere, with hundreds of campers and spectators at the lakeside venue, creates a community feel that sets Wildflower apart from typical race experiences.
History
The Wildflower Triathlon was first held in 1983 and quickly earned the nickname "The Woodstock of Triathlon" for its camping-festival atmosphere at Lake San Antonio. For decades it was one of the most important races on the American triathlon calendar and a key tune-up event for professional athletes.
The race has faced various challenges over the years, including drought-related cancellations due to low lake levels. Despite interruptions, it remains a beloved institution in American triathlon culture, cherished for its challenging course, natural beauty, and the camaraderie of the camping village.
How to Train for Wildflower
Build serious climbing legs
The 5,000+ feet of climbing on the bike demands dedicated hill training. Include long rides with sustained climbs and practice fueling while climbing. Athletes from flat regions should consider training camps in hilly terrain.
Prepare for heat
May in central California can bring temperatures into the 90s. Heat acclimation is critical, and your hydration and cooling strategy must be robust. Start hydrating aggressively days before the race.
Embrace the camping experience
Most athletes camp at the lake, which means managing sleep, nutrition, and race prep in a rustic environment. Practice sleeping in a tent and eating campground meals before race day so there are no surprises.
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