Tumkur is a city located in the southern part of Indian state of Karnataka. It is situated at a distance of 70 km (43 mi) northwest of Bangalore, the state's largest city and capital, along NH 48 and NH 73. It is the headquarters of the Tumakuru district. It is located at an altitude of 835 m (2739.5 ft).

National Highway 48 is a major National Highway of India that starts at Delhi and terminates at Chennai traversing through seven states of India. It has a total length of 2807 km. NH 48 passes through the states of Delhi, Haryana, Rajasthan, Gujarat, Maharashtra, Karnataka and Tamil Nadu. The stretch between Pune and Bengaluru was known as P.B. Road in olden days.