I’ve often see prospective triathletes ask about what distance they ought to pursue for their first event. Most of the time the question is tied to concerns about the swim; everyone can sort of imagine that they will be able to bike and run (or walk) but the swim always seems daunting. The reason it’s daunting is because most swimmers don’t ever do distances like those in a triathlon. if you watch the Olympics, most of the races are far shorter. And if you’ve goofed around with your buddies in the pool, you probably didn’t race more than a length or two. So it’s hard to imagine a long swim.
Nonetheless, my answer to this question is almost always Olympic.
I was in a similar place with the swim when I did my first triathlon (it had been many years since I was really in the water and I never was a swimmer). 6 months is plenty of time to get accustomed to the distance and to get some open water practice in as well so you know what it’s like when it’s time to race.
Funny story – when my older daughter decided to do a half-IM, she jumped in the swimming pool and swam like a fish. When she was in elementary school, she was on the community swim team. That experience left her with swimming “muscle memory” and, even though she wasn’t a top swimmer as a kid and hadn’t been swimming in ages, it came right back and she was easily outpacing me.
Olympic is a good distance to start with because it’s long enough that you’ll be serious about training and it’s an endurance distance which means you’ll focus on moderating your energy throughout the event. I’d only recommend sprint triathlons to those athletes who aren’t looking for endurance events; most of the folks who ask this question, though, are endurance athletes.
While this isn’t a totally fair comparison, I tend to think of sprint vs. olympic the same way I’d think of a 100m dash vs a half-marathon. Sprint triathlons are not “starter” triathlons – they are short distances meant to be done hard and fast, kind of like a 100m dash. Olympic distances are long enough (especially for age group athletes) to become endurance events and your training will reflect that. FWIW, I’m not a “sprint” kind of athlete, so I’ve only done Olympic and longer distances.
Given my lack of real athletic talent, I think that triathlon is mostly about commitment to training. If you are willing to commit to train, the Olympic race should be a great place to start and you’ll feel a real sense of accomplishment when you finish.
