Where exactly in Haridwar is Narayan Bali Puja predominantly performed?

The primary and most significant location for performing Narayan Bali Puja in Haridwar is the Narayani Shila Temple, located near Mayapur. While preliminary rites like a holy dip might occur at a Ghat, the core rituals invoking Lord Vishnu for this specific purpose are centered around the Narayani Shila itself. Some Pandits might also conduct parts of the ritual at associated Ghats like Kushavarta, but Narayani Shila remains the focal point.