The Kumbh is run as a logistics operation on a riverbed

A gathering that moves between four places

The Kumbh Mela is held in rotation at four locations — Prayagraj, Haridwar, Ujjain and Nashik — each associated with a river and each taking its turn according to a cycle determined by astronomical positions rather than by an administrative schedule. There are also intermediate observances between the main ones, under their own names.

Because the timing is astronomically determined, the intervals are not uniform in the way a simple calendar rotation would be, and the significance attached to a particular occurrence varies. The scale attracted to each is enormous, and the published estimates are exactly that, estimates, arrived at by different methods and widely debated.

What can be said without controversy is that these are among the largest planned gatherings of people anywhere, that they are religious events rather than cultural showcases, and that the arrangements around them are correspondingly serious.

The ground is built and then removed

At Prayagraj the mela ground is on the floodplain, land that is under water during the monsoon and available only once the rivers have dropped. A temporary settlement is laid out on it: numbered sectors, a grid of roads laid with steel plating, water supply, sanitation, lighting, hospitals, police stations, lost-and-found systems and a fire service.

River crossings are made by pontoon bridges assembled for the occasion, which are also the choke points during the busiest days and are managed as such, sometimes with one-way movement imposed to keep the flow going. The entire installation is dismantled after the event, before the water comes back.

It is worth appreciating what that means. The place you arrive at is a city with an address system that did not exist a few months earlier and will not exist a few months later, staffed by administrations that plan it for years. Navigation depends on knowing your sector number, because street names are not going to help.

The bathing days are the peaks and the pressure

The gathering runs over weeks, but a small number of specific days are astronomically significant and draw the largest crowds by an enormous margin. On those days the movement of people is controlled tightly, vehicles are stopped far from the ground, and the last several kilometres are walked by everybody, in one direction at a time.

This is where the risk sits. Dense crowds moving through constrained spaces are dangerous when the flow breaks down, and the administrative measures — barriers, one-way routes, timed access, restrictions on vehicles — exist because of that. They are not obstacles being placed between you and the river; they are the reason the day works.

The practical implication for a visitor without a religious obligation to bathe on a particular day is simple. The ordinary days are far easier, the temporary city is fully functional throughout, and much of what is interesting to see — the camps, the akharas, the scale of the layout — is there regardless of the date.

Staying, arriving and leaving

Accommodation ranges from tented camps on the ground itself, run by a variety of operators at very different standards, to hotels in the host city, which fill and reprice months ahead. On the peak days both are effectively unobtainable at short notice, and a great many pilgrims simply do not sleep under a roof at all.

Arrival and departure are the hardest parts. Railways run large numbers of additional services and stations operate crowd-control arrangements, including holding areas and phased entry to platforms, which can add hours at either end. Road access is restricted progressively as the peak days approach.

The workable pattern is to arrive several days before a major bathing date, or several days after, and to allow a full day at each end for the last stretch of the journey. Trying to arrive on the morning of a peak day and leave that evening is the version of this trip that goes wrong.

Being there as a visitor rather than a pilgrim

Most people at a Kumbh are there for religious reasons, and a visitor is a guest at somebody else’s observance. That translates into ordinary courtesies: ask before photographing individuals, particularly at the water; keep out of processions rather than joining them; dress conservatively; and accept that some areas and some moments are not for spectators.

It also translates into self-reliance. Mobile networks are heavily loaded and frequently unusable at peak times, so a group should agree a physical meeting point by sector number rather than relying on phones. Carry identification, water and any medication you need, because distances inside the ground are long.

Dates, layouts, transport arrangements and entry rules are set afresh for each occurrence and published by the organising administration. Check them for the specific event rather than working from an account of a previous one, because the ground itself is different every time.