Gurdwara Reetha Sahib is sitauted in the Reetha Sahib Village Distt Champawat, UttaraKhand. It is 209 KM from Gurdwara Sri Nanak Mata Sahib. Shri Guru Nanak Dev Ji, had visited this place. Guru Sahib took rest under Reetha (Soapnut) tree. He held much spiritual discussion with the Gorakhpanthi Jogis, who lived here. When Bhai Mardana ji asked Guru Sahib for food, Guru Sahib asked Bhai Sahib to Ask the yogis. Yogis denied and asked Bhai Sahib to ask your Guru if he is such a Spritual Man. Then Guru Nanak Dev Ji asked Bhai Mardana ji to eat Reetha, a fruit on the tree which are normally bitter in taste but When Bhai Mardana ji plucked Reetha Fruit and he found it was Sweet. The reetha's were sweet on the side which Guru Sahibwas sitting, and bitter on the side on which Yogis were sitting. The yogis got angry and set a snake on tree with there powers. When Guru Nanak Dev Ji looked on the Snake it got frozen. Even today Reetha fruit is Sweat to eat and is distributed in Prasad. Tree still stands in the Premisis of the Gurdwara Sahib.
Gurdwara Reetha Sahib is only 60 kms. by flying distance north of Nanak Mata, but the distance by motorable road is 209 kms. It is 166 kms. from Tanakpur, the last railway station on Bareilly-Tanakpur section. Here, too, Guru Nanak Dev had an encounter with Nath yogis whom he tried to bring to the path of active humanitarian service along with remembrance of God's Name. The story is not mentioned in the Janamsakhis, but locally a strong tradition has grown that Guru Nanak Dev miraculously made the normally bitter fruit of a soapnut tree sweet for Bhai Mardana to feed on.
A soapnut tree (not the original one) is still here and pilgrims are given prasad of sweet soapnuts. However, the common belief that the nuts of only the one branch, under which the Guru had sat, are sweet is not true. Nor are all the nuts given as prasad from this one tree. About ten kilometers from the Grudwara, there is a tract of land where such trees are grown and their fruit is collected and brought to replenish the Gurdwara's stock of prasad. It is called Nanak Bagichi (lit. Nanak's garden).