Quick terrain facts
Total trek vertical gain: approximately 1,185 metres from Pamba to Sannidhanam.
Average gradient: roughly 18%, with some Appachimedu sections touching about 35%.
Terrain type: semi-evergreen and moist deciduous forest inside a Tiger Reserve.
Rare feature: Urakuzhi Teertham near the Sannidhanam, where the water is remembered as disappearing into a rock cleft.
Center point and route layer
Map center: Sannidhanam at 9.4375, 77.0805.
Base layer: OpenTopoMap to show the mountainous terrain clearly.
Route line: Blue polyline representing the Swamy Ayyappan Road between the marked points.
Medical points: Red Cross markers now indicate the main medical and oxygen-support chain from Pamba to Sannidhanam.
Mobile use: Tap a milestone card first, then zoom the map only if you need a closer look.