Pothana is an early stop on some treks in the Annapurna Himalaya, such as the Ghandruk Trek and the Mardi Himal Trek. It's not far from Pokhara and can be reached through a combination of overland travel and trekking.
If you're starting in Kathmandu, your route to Pothana will be similar—see this article for more.
By Private Transfer and on Foot
Duration: Around 5 hours
From Pokhara, take a private vehicle west along the Pokhara-Baglung Rajmarg Road. This is a well-developed road as many travelers heading into the Annapurnas travel this route. Side-roads, however, are generally just tracks. You'll continue along this road for about an hour until you reach the turn-off to Dhampus, at Kande. From there, you'll continue by foot, hiking through Dhampus and the Australian Camp until you reach the small village of Pothana, which should take around four hours. The trail is peaceful and passes through rhododendron forests, with snow-capped mountains coming into view when the weather is clear.