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Sun April 28, 2024 Delano, CA 93215 US Directions



What will you find at the Grapes of Wrath triathlon?

+ Finisher's Medal
+ Event T-Shirt
+ Finishers meal
+ Rosa Brother's Chocolate Milk
+ Free Race Photos

The Grapes of Wrath Triathlon is a fast and fun race in the central valley located east of Delano, CA. This event features a lake swim in Lake Woollomes, a fast and flat road bike course, and a run which is part trail and part paved finishes the race. Each athlete registered for the Grapes of Wrath Triathlon will receive a custom t-shirt, athlete goody bag, swim cap, post-race meal, and be eligible for raffle prizes and race awards three-deep in each division. Take the weekend and come up and enjoy this fun event with your family.

About the venue:

Three miles southeast of Delano, CA, nestled in the vinyards and orchards of the Central San Joaquin Valley is Lake Woollomes, a 300-acre reservoir with 4 miles of shoreline, making it a cozy location for water recreation.

Swimming is allowed here, making this destination perfect for hot summer days. There’s also a boat dock and a launch ramp for those wishing to take to the water. But, the use is restricted to non-powered boats, so only sailboats, SUPs, and kayaks can be used on the lake.  Pedal Boats, Kayaks, and SUPs are available for rent from Serda's Pedal Boat Rentals on Saturdays and Sundays

This fast, flat course is the perfect place to get your next PR.

A USAT membership is required for the Triathlon, (but not the 5k/10k)  If you do not have one, you can purchase one during the registration process.


32750 Woollomes Ave
Delano, CA US 93215

Packet Pickup

Per USAT rules, triathletes, duathletes, and other multisport participants must present thier ID and USAT card at Pickup.

Bib numbers will be dynamically assigned.


Early Pickup

Lake Woolomes near Transiton
32739 Woollomes Ave
Delano, CA 93215
Saturday, April 27th, 3:00pm-6:00pm

Race Day Pickup

Lake Woollomes near transition
32739 Woollomes Ave
Delano, CA 93215
Sunday, April 28th, 7:00am - 8:00am



Triathlon- 800 yd swim, 10.75 mi bike, 3.1 mi run
Aquabike- 800 yd swim, 10.75 mi bike 
Aquathlon- 800 yd swim, 3.1 mi run
Duathlon- 3.1 mi run, 10.75 mi bike, 3.1 mi run 


Triathlon- 1600 yd swim, 21.5 mi bike, 6.1mi run 
Aquabike- 1600 yd swim, 21.5 mi bike 
Aquathlon- 1600 yd swim, 6.1 mi run 

Run/Walk Only

5K Run/Walk 
10K Run/Walk


7:00am-8:00am  Race day packet pick up
7:00am Transition open

7:50am Multisport Athlete Briefing 
8:00am Olympic Triathlon Starts

8:10am SprintTriathlon Starts 

8:15am Duathlon, 5k and 10k Run Begins 
9:30 5k/10k Awards 
10:30am Multisport Awards 
** Award times are approximate **


2023 Medal and Shirt


The 5k Course is used in the Sprint Triathlon, Sprint Duathlon, Sprint Aquathon and 5k Run


The 10k Course is used in the  Olympic Triathlon, Olympic Aquathon and 10k Run


This bike course is used for both the Sprint and Olympic distances for the triathlon and aquabike.

Sprint distance does one loop of the course (10.75 Mi), Olympic distance does two loops (21.5 Mi).


Volunteers Needed

Volunteers get a t-shirt, meal, and 50% off of a future multisport event or 100% off of a future 5k/10k. 
(Volunteers must register online and check in before and after their shift)

Volunteer codes are transferable and stackable. 

You can volunteer for two shifts during one event for a free triathlon.


This event is hosted by the Activitynut Foundation, Inc.; a non-profit 501(c)3 who's mission is to connect athletes with local events, clubs, coaching and local stores. We maintain a race calendar listing local events at

Join Activitynut Club (free membership), and get 15% off of this and other events hosted by Activitynut.




Race Contact Info

If you have any questions about this race, click the button below.


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