Horse racing in India is over 200 years old. The first racecourse in the country was set up in Madras in 1777. Today, India has a very well established racing and breeding industry, and the sport is conducted on nine racetracks by six racing authorities.

Racing is restricted to Indian-bred racehorses and India has a well established breeding industry with stallions imported from all over the world. The Indian Stud Book maintains records of all thoroughbred breeding activity in India.

India has a mixture of both pool betting and traditional bookmakers.

There are six turf clubs in India.

1. Bangalore Turf Club, which conducts racing at Bangalore in two distinct seasons – in summer from May to August and in winter from November to April.
2. Hyderabad Turf Club, which conducts racing in Hyderabad where racing is held on the Monsoon Track from July until the end of October and on the Winter Track from November until February. Hyderabad usually races on Sundays and Mondays.
3. Royal Kolkatta Turf Club, which conducts racing in Kolkatta, with a main winter season from November to April and a monsoon season which runs from July until mid October.
4. Royal Western India Turf Club (RWITC), which conducts racing in Mumbai from November to May and Pune from July to November.
5. Mysore Turf Club, which runs under Bangalore Turf Club rules, between mid-August and the end of October, as well as smaller summer and winter seasons running in conjunction with the two Bangalore seasons.
6. Delhi Turf Club, established in 1940, which conducts racing at India’s capital usually once a week from August until May, where racing is run under the aegis of RWITC.
Chennai races a winter season at their main facility at Guindy and a spring/summer season at the hill station of Ooty.

Most of the time, except for the summer when Bangalore races on the weekends and Mysore on Wednesdays, there is a seven day race schedule all over the country and simulcasting takes place between all the clubs

Source: https://en.wikipedia.org/wiki/Horse_racing_in_India