Kallar: The Stone River That Became the Gate

Malayalam place names in this part of the Ghats tend to be flatly literal, and Kallar is one of the plainest of them. Kal is stone. Aar is river. The stone river — and if you stand in it for five minutes you will not need the etymology explained, because the bed is almost nothing but rounded boulders, grey and brown and polished, with clear water running between them.

A river made of its own mountain

The boulders are the point. This is a short, steep, young river draining a very wet catchment, and what it mostly does is move rock. In the monsoon it moves a great deal of it, which is why the bed is scoured clean rather than silted, why the pools are deep and cold, and why the whole thing can change shape between one year and the next.

The catchment it drains feeds the Vamanapuram river system, which eventually reaches the coast north of Thiruvananthapuram. That is worth holding onto, because it means the water you are watching at the trailheads is not an ornamental feature of a hill station. It is the top of a working river, and the forest above it is the reason it runs clear at all.

The riverside trail is the easiest walking on this hill and, for most visitors now, the walking they will actually get to do. It is shaded almost the whole way, it crosses and recrosses the water on stone and root, and it rewards stopping more than it rewards covering ground. Fish are visible in the pools without any equipment. The bamboo brakes are loud with birds in the first hour of light. And the light itself — wet canopy, moving water — is the single most photographed thing on this side of the mountain.

Why the gate is here

Kallar is also an administrative fact. The Forest Department check-post sits here, at the foot of the ghat section, and it is the point through which everything on this hill now passes: cars, buses, trekkers, day visitors going up to the viewpoint.

The siting is not arbitrary. Above Kallar there is one road and no alternative route, so a single barrier here controls the entire hill. Below it there are junctions, settlements and side roads, and control would be meaningless. Put the gate at the bottom of the only staircase and you have counted everyone in the building.

What that gate now does has changed considerably. It is no longer simply a place where a fee is collected. Vehicle numbers going up are managed rather than merely recorded, and on busy weekends cars may be held below or moved onto a shuttle arrangement instead of driving to the top. Plastic is prohibited beyond the post and the rule is checked rather than posted. Alcohol and drones are out. And in heavy rain the whole hill can be shut here at a few hours notice because of landslide risk on the ghat section above.

What this means if you have come to walk

Practically: your day begins with someone else deciding how much of it you get. That is not a complaint — the reasons are good ones and the alternative was visibly damaging the hill — but it does change how you should plan.

Arrive early, in the literal sense of being at the post when it opens rather than reaching the town by mid-morning. Carry cash, because fees and guide charges are collected here. Ask at the post which routes are actually running today, and take the answer as final: the upper routes towards the ridge are the first to be closed and the last to reopen, while the riverside trail is the most likely to be available.

And plan a day that works if the answer is the river. A great many people arrive at Kallar intending to climb, are told they cannot, and treat the walk they are offered as a consolation prize. It is not. Wet evergreen forest at the foot of the Agasthyamala massif, with a clear boulder river running through it, is the reason this catchment is protected in the first place. The grassland at the top is thin, small and heavily walked. The forest down here is the substantial thing, and it is open far more often.

Getting there

Kallar is roughly 45 km north-east of Thiruvananthapuram, past Vithura on the low ground. That is a shorter run than the drive to the summit, which is generally given as 53 to 55 km — the difference is the ten-odd kilometres of ghat road above the check-post, and it is the slowest stretch of the journey by a wide margin. If you intend only to walk, you are saving most of an hour each way.

Go between roughly October and March. Outside that window the trails are slippery and often shut, and the leeches from June to November are relentless. Carry salt, wear something that grips, and take your rubbish back out through the gate you came in by.