How do I create a triathlon countdown?

Download the Outside app , create a countdown for your triathlon, set race day, and choose a powerful photo. Add a widget to your home screen and let every day of training feel like meaningful progress.

Can my training partners join?

Absolutely! Share the triathlon countdown on Outside with your training group. Use the group chat to coordinate swim, bike, and run sessions, share nutrition tips, and race-day logistics.

Never miss an important date

Triathlon Countdown

260 days left.

Your Triathlon is on Tuesday, November 24, 2026.

Get the free iPhone app with countdown widgets, reminder alerts, and easy sharing so you can plan ahead for any event.

Start Your Your Triathlon Countdown

Free iPhone app with home screen widgets. Used by 300k+ people.

Triathlon transition area with bikes and gear

260

days

Your Triathlon

Countdown details for Your Triathlon

Swim, bike, run. Your triathlon is coming! Count down to the ultimate test.

A triathlon demands dedication across three disciplines, and the countdown to race day keeps you locked in. Outside helps you track every day of preparation with powerful widgets and reminders for swim sessions, bike maintenance, and brick workouts. Stay focused on the finish line with a countdown that matches your ambition.

Days until Your Triathlon Weeks until Your Triathlon Months until Your Triathlon When is Your Triathlon?What day is Your Triathlon?Get Countdown Widget

Home Screen Widgets

Beautiful countdown widgets that sit right on your home screen.

Lock Screen Widgets

See your countdown without even unlocking your phone.

Live Activities

Real-time countdown updates on your Dynamic Island.

Three sports, one goal

Pick a triathlon photo, open water scene, or a shot of your gear setup. Set reminders for training blocks, nutrition planning, and race registration deadlines. Outside keeps your triathlon goal front and center through every workout.