There are two popular routes to drive from Bangalore to Coorg, first via Mysore, second via Channarayapatna
Coorg Route option 1: Bangalore to Coorg via Mysore : The Bangalore to Mysore route (SH17) : Bangalore - Bidadi - Ramanagaram - Chennapatna - Maddur - Mandya - Srirangapatna - Mysore. Mysore to Coorg (SH88) : Mysore - Yelwal - Hunsur - Kempalapura - Piriyapatna - Bylakuppe - Kushalnagara - Suntikoppa - Madikeri . Coorg Route option 2: Bangalore to Coorg by NH48 ( distance 291km ) route goes like this: Bangalore City --30km-->Nelamangala--44km-->Kunigal--46km-->Bellur Cross (Nelligere)--45km--> Channarayapatna --22km-->Holenarsipur--22km-->Arkalgud--22km-->Sanivarasante--20km-->Somwarpet--40km-->Madikeri Town