Where Kumbh Mela Takes Place ?

Kumbh Mela takes place every twelve years at one of the four places: Allahabad, Haridwar, Ujjain and Nashik. The Mela alternates between Nasik, Allahabad, Ujjain and Haridwar every third year. The Ardh (half) Kumbh Mela is celebrated every six years at only two places, Haridwar and Allahabad.

In 2001, more than 40 million gathered on the busiest of its 55 days.
According to the Mela Administration's estimates, around 70 million people participated in the 45-day Ardh Kumbh Mela in Allahabad, in 2007.

The last "Kumbh Mela " held in 2010 in Haridwar estimated by the authorities to attract between 30 and 70 million people.

The current Maha Kumbh Mela began on 14 January, 2013 at Allahabad (Prayaga). . According to expectations more than 100 million people will attend the 2013 Kumbha mela.

The next Kumbhamela will be held at Ujjain (MP) on the bank of river Shipra in 2016. The Kumbh at Ujjain is also called "Simhastha".

Kumbh Mela is organized every three years on a rotation basis of Allahabad, Nashik or Nasik, Haridwar and Ujjain.

•     Kumbha Mela: Held at all four places.

1. Ardha Kumbha Mela: Held at Haridwar and Prayaga (Allahabad), every 6 years.
2. Purna Kumbha Mela: Held only at Prayaga, every 12 years.
3. Maha Kumbha Mela: Held only at Prayaga, every 144 years.

Kumbha is a very great festival in Hindu religion. Conducted in four pilgrim centers around the country Allahabad, Haridwar, Nashik and Ujjain.

Allahabad
Triveni Sangam, the meeting place, of the rivers Ganges, Yamuna and mythical Sarasvati.

Haridwar
On the bank of river Ganga.

Nashik
There are 14 Akhadas, of which 11 belong to the Shaiv sect (of the 11 Shaiv Akhadas, one—Bhudad Akhada—is defunct, while 10 are active) and 3 to the Vaishnav sect. The Shaiv Akhadas take a holy dip at Kushavart in Trimbakeshwar, about 30 km from Nashik.[42] The Vaishnav Akhadas perform rituals at Ramkund in Godavari and stay at Tapovan.[43]The Vaishnav Akhadas have Khalsas (religious groups headed by Mahants attached with Akhadas) attached with them. Both Shaiv and Vaishnav Sadhus used to take the holy dip in Trimbakeshwar, until 1838, when a clash between them led to bloodshed and the Peshwa ruler requested Shaiv sadhus to perform rituals at Trimbakeshwar and Vaishnavs to move downstream to Ramkund in Nashik.

Ujjain
On the bank of river Shipra.

Ref: http://en.wikipedia.org/wiki/Kumbh_Mela