About Rusa Terbang & Race Buddy

Rusa Terbang is a private, recreational running crew from Bandung and Jakarta. Two cities, one group chat, one shared calendar of races. Rusa terbang is Indonesian for flying deer — the winged stag on every page is us.

We run for the fun of it: easy mornings before work, long runs at the weekend, and a handful of races a year that we train for together. Nobody is paid, nobody is sponsored, and no pace is too slow to belong. What the crew shares is the start line, not the finish time.

This site is the crew's own toolbox. The race list shows where the crew is heading this season. Each of those races gets a Race Buddy board for planning and for race morning, and the calculators are free for anyone. Membership is by invitation from someone already in the crew.

A question, a mistake in the data, or a race you think we should run? Write to us — the address is on the contact page.

Race Buddy is a project by Rusa Terbang (opens in a new tab) — a private recreational running crew from Bandung and Jakarta, Indonesia. The Rusa Terbang logo (rusa terbang is Indonesian for flying deer — the winged stag you see in the masthead, the footer and every app icon) is our identity. Race Buddy stays independent. Rusa Terbang is not the organiser, not a sponsor, and not affiliated with any event.

Race Buddy was drafted, iterated and reviewed with the help of several AI models from Anthropic, Moonshot AI, Z.ai, DeepSeek, Qwen and xAI — directed and edited by a human (runner, programmer, system architect) throughout, with some advice from a World Athletics certified coach. Treat every number here as a planning aid when building your plan, not a guarantee — check it against the organiser's official materials (Event tab) before race day.

Your target, wave, paces and checklist ticks stay in this browser. The plan is not uploaded.

The race-morning forecast is the board's own network call, and it sends only an area code.

If you create an account, your profile holds only what a feature needs, and every field says its purpose where you type it: race category and birth year for your age-group category and anonymous totals; height and weight for the premium heat-load and fuelling numbers; optional personal bests for your predicted finish. It is stored on our server with your consent, and shown back only to you.

Deleting your account (a button on the account page) scrubs it completely, keeping only anonymous bands no one can trace. Plans you choose to sync are stored so they can open on another device. Premium content, when you hold a race strategy, is fetched when you open the tab, and one copy stays on this device for race morning — signing out or deleting the account deletes it.

Course and event data come from the organiser's public route map, event-day rundown and posts (linked on the Event tab). The route line, elevation and kilometre marks are derived from the organiser's course GPX.