Triathlon

I've have a new goal:
One September 19th I'll run a triathlon to demonstrate to myself that this summer's physical training should be considered a success.
I always thought triathlons were longer but I'll be
Swimming 500 m
Cycling 26 km
Running 5 km

This makes it a "sprint"-triathlon. I'd rather try an "olympic"-triathlon of
Swimming 1.5 km
Cycling 40 km
Running 10 km
but this Triathlon doesn't have that as an option.