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: Very 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 friendlyDoable3.0
Hilly (reported over 2,000 ft / 610 m), rough roads, steep Lynch Hill; but teams and first-time Olympic racers did attend in 2025. · Medium confidence
Course traits, not part of the score
- PR potentialSlow1.9
Rolling hills, rough roads and trail running; 2026 age-group winner (M60-64) took 2:40:41 and a 2016 racer lost 25 min against a flat Olympic. · Medium 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 easeEasy3.6
Rectangular buoy loop, uncrowded last wave in 2026; early waves can be contact-heavy. · Medium 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 speedSlow2.2
Rolling out and back with Lynch Hill and rough roads; 2026 winner averaged 18.6 mph (30 km/h) on 24.5 mi (39.4 km). · Medium confidence
- Bike flatnessRolling2.6
Over 2,000 ft (610 m) reported by one 2016 racer, in the 400 to 600 m (1,970 ft) hilly band; organiser publishes no 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 conditionsHard2.2
Off-camber trail miles 3 to 5, little shade, afternoon heat reported. · Medium confidence
Course traits, not part of the score
- Run flatnessHilly2.2
Steep trail and road climbs over the 10 km (6.2 mi) run. · Medium 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 1,500 athletes
- Entry fee
- About $240
- First held
- 1983
- Distances
- 1.5 km (0.9 mi) swim, 40 km (24.9 mi) bike, 10 km (6.2 mi) run
- Cutoffs
- Swim 1:00, Bike 3:15
- 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 climbing
- 610 m (2,000 ft)
- 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
- Athletica forumRaced 2026 · forum · Positive
A club group camped on site, previewed Lynch Hill on Saturday and called the weekend special. He found the bike rolling with bad road surfaces and a punchy opening climb, and the run rolling with aid-station walking. Swim in the last wave was uncrowded and T1 ran over hard pavement.
- 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 2016 · blog · Mixed
A drought-year Olympic race: chaotic swim start from the boat ramp with low-sun sighting issues, a taxing bike with over 2,000 ft (610 m) of climbing and fast descents, a run with an enforced walk on Beach Hill, and growing heat. He praised Tri-California's hosting but finished far slower than a flat Olympic weeks earlier.
Show 3 more
- 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.
- Active.com: Wildflower Triathlon guideRaced 2017 · article · Positive
A course guide calling the hills as big as their reputation: Lynch Hill out of transition, a rolling 40 km (24.9 mi) bike, a run that starts on shady path then climbs on sunny road to about 1,200 ft (366 m). Campsites are unassigned, showers are shared, transition is large and volunteers lift the mood.
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Sources
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