Wildflower Experience (Olympic and sprint)
Lake San Antonio (South Shore, Bradley), United States · May · Independent (Wildflower Experience, Colleen Bousman)
Why people love it
- Original 1983 festival with on-site camping and an expo, back since 2025.
- Clean reservoir, about 18 to 20 °C (65 to 68 °F), wetsuit legal.
- Cal Poly student aid stations are praised in several reports.
- Olympic and sprint start in separate waves; fields are about 1,500, far below the old peak.
- Rolling oak-hill scenery above Lake San Antonio.
Watch out for
- Rough, patched roads that riders called brutal; bring a sturdy bike and tyres.
- Lynch Hill climbs over 90 m (300 ft) in the first mile, then 56 km (34.8 mi)/h (35 mph) descents.
- Run has steep trail and off-camber sections, with little shade in the afternoon.
- Remote park about 100 km (62 mi) from the nearest small airport; no shop on site.
- Olympic awards ran late in 2025 and roads stayed closed until about 3 p.m.
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 30% of the overall score.
Toughness: Tough
- Racer satisfactionLoved4.1
Nearly every 2025 forum poster would return and a 2026 report calls it special; complaints are rough roads and remote logistics. · Medium confidence
- OrganizationWell run3.7
Smooth transition and signage in 2025, but no sag support, a long road closure, closed facilities and late Olympic awards. · Medium confidence
- First timer friendlyDoable3.4
500 m (0.31 mi) swim and 20 km (12.4 mi) bike; few first-timers among about 187 sprinters in 2025; off-road sprint reviewed as hard. · Low confidence
Course traits, not part of the score
- PR potentialSlow2.4
Same rough roads and Lynch Hill; sprint course profile not published. · Low confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 16% of the overall score.
- Wetsuit legalAlmost always4.6
Expected 18-20 °C (65-68 °F); USA Triathlon age-group wetsuits legal up to 25.6 °C (78 °F). · Medium confidence
- Water temperatureComfortable4.2
Official 65-68 °F (18-20 °C); 2025 posters called water clean and warm. · Medium confidence
- Calm waterMostly calm3.7
Inland reservoir without swell; afternoon wind and a rough start scramble in 2016. · Medium confidence
- Swim easeEasy4.0
500 m (0.31 mi) in the same sheltered reservoir. · Low confidence
- Swim experienceGreat3.9
Clean reservoir amid golden hills, wave starts; chaotic starts in lower-water years. · Medium confidence
- Swim supportGood3.5
Wave starts and USAT sanctioning but no published count of kayaks or lifeguards. · Low confidence
Bike
Road surface, closures, scenery and wind. Counts for 18% of the overall score.
- Road surfacePatchy1.7
Five 2025 posters and several earlier reports: rough, potholed, patchy; a pothole crash on the long course. · High confidence
- Road closuresPartly closed2.8
Single file on the right with vehicle warnings, though one report says roads were closed until about 3 p.m. · Low confidence
- Bike sceneryBeautiful3.9
Rolling oak hills and lake views; limited detail in reports. · Medium confidence
- WindSome wind2.9
Wind is part of the day, with some tailwind return; no data. · Low confidence
Course traits, not part of the score
- Bike speedAverage2.7
Rough roads and the opening climb slow it. · Low confidence
- Bike flatnessRolling2.9
20 km (12.4 mi) with Lynch Hill and rolling San Antonio Drive; no elevation figure. · Low confidence
- Bike simplicitySome technical parts2.8
Out and back but steep Lynch Hill descent above 35 mph (56 km/h), pothole risk. · Medium confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportDecent3.4
Campsite cheering and fun aid stations, but a remote venue and only about 1,500 racers. · Medium confidence
- Aid stationsGood4.1
Cal Poly volunteers praised in 2008 and 2025 reports. · Medium confidence
- Run sceneryBeautiful3.8
Shoreline, creek and ridge views. · Medium confidence
- Run conditionsModerate3.2
Shorter exposure to heat. · Low confidence
Course traits, not part of the score
- Run flatnessRolling3.0
5 km (3.1 mi) run profile not published. · Low confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 13% of the overall score.
- Air temperatureWarm or cool3.4
21-27 °C (70-80 °F) in 2025 but about 32 °C (90 °F) in 2018. · Medium confidence
- Weather reliabilityReliable3.8
Dry California spring; heat varies by year. · Medium confidence
- Venue beautyLovely4.2
Large lake, golden hills, festival on the shore. · Medium confidence
- Spectator friendlySome viewpoints3.2
Expo beside the finish; out-and-back bike is remote from camp. · Low confidence
Course traits, not part of the score
- Low altitudeLow4.2
Lake at about 240 m (780 ft), course rising to about 370 m (1,200 ft). · High confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 10% of the overall score.
- Hotel availabilityBook early3.0
Camping, RV and bell tents on site; hotels 30 to 45 min away. · Low confidence
- Hotel valueNormal3.0
Camping adds cost; locals note high prices; 10 dollar beer. · Low confidence
- WalkabilityWalkable4.4
Camp on site, transition a short ride or walk away. · Medium confidence
- Travel easeAwkward2.3
About 100 km (62 mi) from San Luis Obispo airport; a car is needed. · Medium confidence
- LogisticsSome complexity3.1
Single park, but large transition, camping registration and shuttles. · Medium confidence
- Town and foodLimited2.4
General store closed; food trucks and Paso Robles 45 minutes away. · Medium confidence
Key facts
- Location
- Lake San Antonio (South Shore, Bradley), California, United States
- Typical month
- May
- Latest or next date
- 3 May 2026
- Organiser
- Independent (Wildflower Experience, Colleen Bousman)
- Field size
- About 187 athletes
- Entry fee
- About $240
- First held
- 1983
- Distances
- 0.8 km (0.5 mi) swim, 20 km (12.4 mi) bike, 5 km (3.1 mi) run
- Cutoffs
- Swim 0:30, Bike 2:00
- Swim venue
- Lake San Antonio, Harris Creek boat ramp area (reservoir)
- Water temperature
- 18–20 °C (64–68 °F)
- Wetsuit
- Legal
- Swim start
- wave
- Swim laps
- 1
- Bike laps
- 1
- Key climbs
- Lynch Hill, over 300 ft (90 m) in the first mile, steep descent back to T1 where speeds pass 35 mph (56 km/h)
- Run laps
- 1
- Run shade
- Mostly exposed; some shade along the creek section
- Air temperature
- 10–30 °C (50–86 °F)
- Humidity
- dry inland California spring
- Altitude
- 240 m (785 ft)
- Nearest airport
- San Luis Obispo (SBP), roughly 100 km (62 mi); San Jose (SJC) or Santa Barbara 3 to 4 h by car, 100 km (62 mi) away
- Where to stay
- On-site camping, Paso Robles
- Booking
- Most athletes camp in the park (registration required; tent, RV hookups, bell tents) or drive from King City, Paso Robles or Bradley. Park store closed; food trucks only.
What racers and reviewers say
- Slowtwitch forum: So how was Wildflower?Raced 2025 · forum · Positive
About a dozen racers agreed the roads were rough, the reservoir clean and the vibe great, and almost all would return. Complaints were no real sag support, closed facilities, a long road closure, late Olympic awards and few finishers. Cal Poly aid-station volunteers and the expo drew praise; a cold front kept temperatures near 21 to 27 °C (70 to 80 °F).
- Slowtwitch: Wildflower Is Back But Can It Survive?Raced 2025 · article · Positive
A first-hand account of the 2025 comeback rated the weekend 9 out of 10: smooth transition, casual 8:30 start, expo by the finish, good food trucks. Negatives were rough roads on the first half of the bike, 10 dollar beers, no pro field and a small field of about 1,500.
- Slowtwitch news: Original Wildflower back on the scheduleRaced 2025 · article · Positive
Describes the return of the original organiser, the lake being nearly full after drought, new facilities and 2025 prices of 238.50 dollars for Olympic and 176.10 for the off-road sprint. Explains the history: 9,000 registrants at the peak and about 70 clubs camping.
- Adventure Sports JournalRaced 2018 · blog · Negative
A spouse's account of the 2018 long course: a pothole 5.6 km (3.5 mi) in dislodged a competitor's aero pads, and he later collapsed with a carotid dissection. Reports nearly 1,130 m (3,700 ft) of climbing on the long bike and temperatures near 32 °C (90 °F). Mainly a warning about road quality.
- DC RainmakerRaced 2008 · blog · Mixed
Long-course report with detail that still applies to the venue: a rough swim start, steep opening bike climb, a trail run harder than expected, kinda hot weather, camping in the park with early car alarms, Cal Poly aid stations and a very large transition.
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Sources
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