This is the final year undergadaute thesis done in the partial fulfillment of requirements for the Bachelor's Degree in Geomatics Engineering. This group project- “Integrated PGIS for the Sustainable Development of Tourism of Machhapuchhre Trek Route and Development of Mobile Based Application" encompasses various decision-making tools like AHP, MCDA and spatial analysis like least cost path analysis, ArcGIS model builder to generate the least cost path (most suitable trek route)for the trekking route in newly explored but not fully developed Machhapuchhre Region. Also, the various amenities, details, attractions and hubs for the trekking are disseminated through the mobile based android application. And this definitely would help to ease the trekking in the region.