Napa Valley Fall Triathlon Long Course (Alpha Win)
Putah Canyon (Lake Berryessa), Napa, United States · October · Alpha Win
Why people love it
- Swim in Lake Berryessa from Putah Canyon, with Napa County hills as the backdrop
- Scenic rolling bike through Pope Valley vineyards with lake views
- Generous cutoffs: 1 h 10 swim and 8 h 30 total
- Late-October highs of 18 to 26 °C (64 to 78 °F) suit the run
Watch out for
- Roads are open to traffic; no closures on the bike course
- Lake can be very cold; reviewers recommended booties and the swim may be shortened below 15 °C (59 °F)
- Bike aid only every 16 to 32 km (10 to 20 mi)
- Run is rolling and unshaded
- Safety complaints from 2017 predate the current organizer; no recent reviews found
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 27% of the overall score.
- Racer satisfactionLiked2.9
Three reviews from 2015 to 2017 praise the scenery and amenities but cite a very cold swim and, in 2017, serious safety complaints. · Low confidence
- OrganizationAdequate3.0
Reports ranged from smooth packet pickup in 2015 to no medical tent and too few volunteers in 2017; the current organizer's guide is thorough. · Low confidence
- First timer friendlyDoable2.5
A 2016 first-timer found it hard: cold water, open roads and rolling terrain, though the cutoffs are generous. · Low confidence
Course traits, not part of the score
- PR potentialAverage2.5
A rolling bike and an unshaded rolling run, with cold water; no finish times found. · Low confidence
- Course easeVery tough2.4
Reviewers rated difficulty 3 to 5 out of 5 for rolling hills, an unshaded run and cold water; elevation gain is not published. · Low confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 15% of the overall score.
- Wetsuit legalAlmost always4.6
Wetsuits are legal below 25.6 °C (78 °F) and recommended, but the swim may be shortened below 15 °C (59 °F). · Medium confidence
- Water temperatureAcceptable3.1
About 20 °C (68 °F) last year per the organizer, but 2015 to 2016 reviewers found it very cold and advised booties. · Low confidence
- Calm waterMostly calm4.0
A large reservoir cove with no chop complaints. · Low confidence
- Swim easeEasy3.8
A rectangular course with a 1 h 10 cutoff; a 2017 reviewer saw swim waves crossing each other. · Medium confidence
- Swim experienceFine3.3
Scenic but cold, with a 2017 report of crossing waves. · Low confidence
Bike
Road surface, closures, scenery and wind. Counts for 19% of the overall score.
- Road surfaceMixed3.0
Scenic county roads, but a 2017 reviewer flagged a potholed access road. · Low confidence
- Road closuresOpen traffic1.2
The athlete guide says no roads are closed; stay right on the shoulder. · High confidence
- Bike sceneryBeautiful4.4
Pope Valley, vineyards, pastures and lake views; reviewers call it beautiful. · Medium confidence
- WindMostly calm3.5
A hill-sheltered lake canyon with no wind complaints. · Low confidence
Course traits, not part of the score
- Bike speedAverage2.5
Reviewers describe constant climbs and descents on rural county roads, with potholes on the access road in 2017. · Low confidence
- Bike flatnessRolling2.6
Rolling with constant climbs and descents; elevation gain is not published. · Low confidence
- Bike simplicitySome technical parts3.0
Constant climbs and descents on rural roads; no technical descents reported. · Low confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportSparse1.6
One reviewer saw no crowd support along the whole course, and the 2015 full-distance field was about 30. · Medium confidence
- Aid stationsStandard3.0
Bike aid only every 16 to 32 km (10 to 20 mi); run aid every 1.6 to 2.4 km (1 to 1.5 mi). · Medium confidence
- Run sceneryBeautiful4.2
Lake Berryessa views and rolling hills. · Medium confidence
- Run conditionsModerate2.6
Reviewers found the run unshaded and rolling; late-October highs reach 18 to 26 °C (64 to 78 °F). · Medium confidence
Course traits, not part of the score
- Run flatnessRolling2.8
A double out-and-back on the rolling hills of Knoxville Road, per an older listing. · Low confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 15% of the overall score.
- Air temperaturePleasant4.3
Late-October highs of 18 to 26 °C (64 to 78 °F) and lows of 7 to 14 °C (45 to 57 °F), 2021 to 2025. · Medium confidence
- Weather reliabilityReliable3.6
Fall in Napa is usually dry and mild, though an April 2017 edition had 3 °C (37 °F) mornings and hypothermia. · Low confidence
- Venue beautyStunning4.6
Reviewers rated the scenery 4 to 5 out of 5, with lake, hills and vineyards. · Medium confidence
- Spectator friendlyTricky2.2
A remote campground venue, with the bike course miles away and little crowd support. · Medium confidence
Course traits, not part of the score
- Low altitudeSea level4.6
Lake Berryessa sits at roughly 130 m (430 ft); exact value not found. · Low confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 11% of the overall score.
- Hotel availabilityBook early3.0
Camping on site, hotels 40 to 60 km (25 to 40 mi) away in Napa Valley; no sell-out data. · Low confidence
- Hotel valuePricey2.3
Napa Valley lodging is generally expensive; camping at the venue is cheaper. · Low confidence
- WalkabilitySome driving3.0
Camping at Putah Canyon is walkable; hotels need a long drive. · Low confidence
- Travel easeAwkward2.0
The venue is 21.6 km (13.4 mi) from CA-128 on a rural road, and the airports are in Sacramento or the Bay Area. · Low confidence
- LogisticsSimple3.6
One venue with a single 9:00 am wave start, and Friday packet pickup. · Low confidence
- Town and foodFine3.2
Napa Valley wine country is within driving distance; the venue itself is remote. · Low confidence
Key facts
- Location
- Putah Canyon (Lake Berryessa), Napa, California, United States
- Typical month
- October
- Latest or next date
- 24 October 2026
- Organiser
- Alpha Win
- Entry fee
- About $239
- Distances
- 1.9 km (1.2 mi) swim, 90 km (56 mi) bike, 21.1 km (13.1 mi) run
- Cutoffs
- Swim 1:10, Bike 5:10 cumulative, Finish 8:30
- Swim venue
- Putah Canyon Recreation Area, Lake Berryessa (reservoir)
- Water temperature
- 18–22 °C (64–72 °F)
- Wetsuit
- Legal and recommended (USAT 78 F / 25.6 C rule)
- Swim start
- wave
- Run shade
- unshaded
- Air temperature
- 7–26 °C (45–79 °F)
- Humidity
- dry Mediterranean autumn
- Nearest airport
- Sacramento (SMF) or Bay Area airports
- Where to stay
- Putah Canyon campground, Napa Valley towns
- Booking
- Putah Canyon campground at the race site; Napa Valley hotels are a long drive.
What racers and reviewers say
- RaceRaves: 'Horribly organized, no concern for safety'Raced 2017 · aggregator · Negative
HITS-era half-iron spectator report: no medical tent, hypothermic athletes, no mount or dismount line, an unmonitored transition, potholes on the access road, crossing swim waves and too few volunteers. Praised the scenery.
- RaceRaves: 'Cold water, beautiful bike course'Raced 2016 · aggregator · Mixed
First-timer: logistics were not the best, the course is beautiful and a long weekend suits it, but the water is very cold and booties are recommended. Difficulty 4/5, scenery 4/5.
- RaceRaves: 'Excellent start to the tri season'Raced 2015 · aggregator · Positive
Spectator of a half-iron athlete: quick packet pickup, a smooth transition, good swag and food and kid area, with a tiny field, an icy swim and a rolling, unshaded run with little crowd support. Difficulty 5/5, production 5/5.
- ABC7 News: hypothermia at HITS Napa ValleyRaced 2017 · article · Negative
April 2017 report: about 30 athletes showed hypothermia symptoms after the swim at 37 F (3 C) air at the lake, and one rider was hospitalised after a crash on Berryessa Knoxville Road. Shows cold-spring risk rather than the October date.
- Alpha Win Napa Valley Fall 2025 Athlete GuideRaced 2025 · article · Mixed
Operations detail: 9:00 am Long Course wave, swim cutoff 1 h 10, bike cutoff 5 h 10 cumulative, run cutoff 8 h 30, aid every 10-20 mi (16-32 km (9.9–19.9 mi)) on the bike and 1-1.5 mi (1.6-2.4 km (1–1.5 mi)) on the run, cold-weather swim rules and no road closures.
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- Race Roster 2014 Napa Valley Vintage Triathlon (same lake, other organiser)Raced 2014 · aggregator · Positive
2014 listing for another half at Putah Canyon: high 60s to low 70s F (about 20-22 C) swim, a rolling Pope Valley bike with aid at miles 18, 35 and 48, and a double out-and-back run on Knoxville Road. Not an Alpha race, so course detail is only indicative.
Sources
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