OSM node 245586959 fixes Udumalpet. OSRM gives 21.83 kilometres to Amaravathi and 18.59 to Thirumoorthy.
Choose one each morning
The reservoirs lie on separate roads; rushing both encourages late forest-edge travel.
Water rules first
No swimming or unrestricted spillway, canal or shore access is assumed.
Return to town
Fuel, eat and sleep in Udumalpet rather than waiting for an uncertain night pickup.