Hi, I'm Oleksandr 👋

I'm a runner, and my dream is to finish all eight World Marathon Majors. Every race has its own ballot, its own dates and its own rules — so to stop missing registrations, I collected everything in one place. Maybe it will be useful for you too.

And while you're waiting for the next ballot to open, have a look at the handy developer tools I built along the way.

Marathon majors · what's next

  • Loading the latest ballot dates…
Dates from official race announcements. All 8 majors →

Projects

zr

Zots Run

Race dates and ballot windows for all eight marathon majors, plus running calculators.

Majors ballotsPaceRace predictorSplits
run.zotsenko.com →
zt

Zots Tools

14 free developer tools that run right in your browser — nothing you paste is uploaded.

JSONYAMLDiffJWTSSL checkerCron
tools.zotsenko.com →