Namaste! There are hundreds of yoga schools in Rishikesh that offer yoga and meditation retreats. But Ekattva Yogshala is my personal favorite. This yoga school was recommended by my sister during my trip to Rishikesh. I joined a 5 day Yoga retreat there and must say the experience was remarkable. My retreat was conducted by Kladendra Chauhan, one of the most experienced yoga teachers in Rishikesh. I learnt about yoga, meditation, pranayama and breathwork. I practice regularly now and the lessons have been great. Plus, the location is wonderful. Those 5 days are still fresh in my head. Check out their website to discover more about this yoga school situated in Rishikesh: https://www.ekattvayogshala.com/