Manaslu Circuit is becoming one of the famous circuits that Nepal has to offer. Earlier it was only Annapurna. The Manasly trek is 14 days trek that includes both Hindu and Buddhist centers, wildlife, flora, rives, mountains and bridges. One cannot just start trekking here. You need a proper permission from the government to start with it. Arrange for an agency to get yourself registered.
The best months to trek here are March – to May and September – November.