
From the Organizer
2027 Cal Tri Lake Perris - 4.11.27. This race is enclosed within an 8,200-acre rugged playground close to several major population centers including Anaheim (55 miles), LA (70 miles) and San Diego (90 miles).
18 EVENT OPTIONS. 6 Olympic distance events (Triathlon, RunBikeRun, SwimBike, SwimRun, 1640 Yard Swim & 10K Run), 6 Sprint distance events (Triathlon, RunBikeRun, SwimBike, SwimRun, 400 yard Swim & 5K Run) and 6 Youth Sprint distance events (Triathlon, RunBikeRun, SwimBike, SwimRun, 400 yard Swim & 5K Run). Triathlon = swim + bike + run. Typically, the swim and run distances are standard but the bike distance varies from race to race. Check out the course maps for more detailed information.
TO DO. Lake Perris. Mission Inn Museum. March Field Air Museum.
AIRPORT. Ontario (ONT)
AIR TEMPERATURE (AVG). 53 F / 76 F
WATER TEMPERATURE (AVG). 62 F. Wetsuit recommended. Use the 20% 2026CALTRI discount code at blueseventy. Note: Fusion wetsuits not eligible for discount.
Events
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
73°
Typical Low
43°
Based on US Climate Normals data from March Afb, 6 mi from the venue.
Host City
City Elevation
1,709 ft
Nearest Airport
SBD
San Bernardino International Airport · 21 mi
Time Zone
Pacific Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at 2027 Cal Tri Lake Perris - 4.11.27, put it on the calendar, and turn “someday” into a start date.
298
Days to train
Coming Up
2026 Solana Beach Triathlon & Duathlon and Solana Beach 5K
57 miles away
Pacific Coast Triathlon
39 miles away
2026 Optimism Cal Tri Newport Dunes - 11.1.26
39 miles away
Bayshore Sprint and 70.4
53 miles away
From Endurance Grid
This race spans more than one sport — here’s a guide to each, so you can understand what’s involved and decide if it’s the right fit. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
Swim, bike, run — back to back. The sprint distance makes it far more accessible than most people think.
A swim followed by a bike — a triathlon without the run. Sprint to long-course, often alongside a tri at the same venue.
Run, bike, run. The multi-sport format without the swim — a great bridge between running and triathlon.
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Open water races from 1 mile to marathon distance. Just you, the water, and whatever you've got left.
A continuous race alternating open-water swimming and running across a series of segments.
Frequently Asked Questions (FAQs)
2027 Cal Tri Lake Perris - 4.11.27
Apr 11, 2027