Thirteen

Classic format: one submission, 13 km, logged inside the window. No accumulation, no second attempts—the result is what the single run delivers.

Clock (UTC). The window runs 00:00 on 1 June through 23:59 on 15 June. One verified run inside that span is the race.

After the window. The live phase closes on 15 June; official standings follow after verification. Provisional order can shift until Results out.

Thirteen kilometres at race pace, clean verification, once. The Classic format does not allow the load to be spread—the whole distance must be in a single verified activity.

June is full: Mundial is running, Rembrandt opens on 8 June, Solstice is still live. .execution closed just days before. Thirteen is the shortest fixed target of the June block—the cost of entry is low; a clean run is all it takes.

• When to go — Fifteen days is room to pick a moment, but not to keep postponing. The first week of June is still near .execution’s close; the second week sits inside the full June load. Neither is obviously easier.

• Pace vs verification — Thirteen kilometres in a single verified run. Overreaching on pace inside a loaded June week is its own risk.

• Enter vs stay out — 1945 and Thirteen are the only short classics in the season. A result here counts in full against anyone who skips it.

A verified 13 km in the Classic line closes the short-distance pair of the season—1945 in May, Thirteen in June. Both sit inside months already carrying longer formats; both count in full.

At Results out, the race locks. Until then, provisional positions can move.