We did the Annapurna Circuit and the Upper Mustang by gravel bike, which were both amazing and very different experiences. Annapurna is biking or hiking through stunning views of everything the Himalayas have to offer. Upper Mustang is like traveling back through time with the most pristine and charming villages and breathtaking landscapes before ending up in the walled city of Lo Manthang. Naba and the people at Third Rock were so helpful and went beyond their job to first help us where they could with our lost luggage and then understanding what we were looking for on our trip. They catered to our specific needs and made it a very smooth experience. Communication was consistently very good throughout the whole stay in Nepal before, during and after our bike trek. It made us feel supported whenever we needed it, so we could simply enjoy all the beauty that was continuously on display. Our guide, Karma Sherpa, was everything and more than what we were looking for. A friendly, knowledgeable and helpful guide. Always there with insightful advice when you needed him and discreet when you wanted some alone-time. He exceeded expectations in taking care of us and made sure our trip was everything it could be. To sum up: very much recommended for all those who are looking to find their own unforgettable adventure in Nepal.