The bottleneck at the first corner
At a typical zombillion, the first real test is not the mud or the fake blood. It is the first sharp turn 200 metres after the start. When 300 runners leave together, the front pack reaches the corner in under a minute; the back half arrives four minutes later. Zombies assigned to that corner have already chased, missed, and reset. The problem is not the course layout. It is the release valve: one start time for every pace.
The cause is a single start line
A single gun start compresses too many speeds into one narrow window. Runners who planned to walk are mixed with runners chasing a personal best. Zombies cannot tell the difference until the pack is on top of them. The result is a burst of noise, a bottleneck, and a long quiet gap. That gap strips the event of its story: the chase should feel continuous, not like a queue for a haunted house.
The staggered-wave solution
The fix is a wave start with small groups, clear role briefings, and a short reset window. In a well-run zombillion, runners leave in groups of 25 to 40 every three to four minutes. Zombies are assigned to zones rather than to a single startline. A “safe zone” before the first corner lets runners spread out before the first chase. Southampton Sport’s zombillion page is the practical place to confirm wave times and entry details, and it is worth checking before you choose a start slot. The takeaway: if the waves are spaced, the zombies can work the whole course, not just the first 200 metres.
What runners should do
Runners can help the format work. Choose a wave that matches your honest pace, not your optimistic one. Arrive at the briefing early enough to hear zone rules. Keep left on narrow sections so faster runners and zombies can pass. A short list makes the difference:
- Pick your wave by pace: a walk-run wave is not a penalty; it keeps the chase spaced.
- Listen for zone resets: if a marshal holds a gate, stop; the pause keeps the next chase fair.
- Do not cluster at safe zones: move through, then regroup at the next wide section.
The result is a course that feels designed rather than congested. A runner who starts in the right wave meets zombies who are ready, not exhausted. A zombie who works a zone gets a steady stream of runners instead of one dense flood. The zombillion works when the start is treated as part of the game, not as a formality before it.