Under two hours from Sombarey lies Hilley, that is a short drive away. The trek commences from Hilley and takes you through rolling hills, that are mismatched with bamboo and rhododendron thickets, bursting with chilly sunshine and the warble of a few hundred rare birds. This stretch leads us to Barsey, where you'll have lunch and then continue to the campsite for the night, at Lasune.
The Barsey Rhododendron Sanctuary is situated in West Sikkim. It falls in the Singalila Range and is a part of the Singalila Ridge Trek route. The starting point of the trek is at Hilley. The trek is a 4.5 km easy trek suitable for all. It gradually climbs to a height of 10000 ft where you can view grandiose view of the Kanchenjunga ranges.At Hilley, you will see the check post and entrance to the Barsey Rhododendron sanctuary. That is your entry point. A friendly guide waits at the entrance and you have to get tickets to enter the sanctuary. There is a well marked path that would leads to the destination. The trekking route passes through deep forest of oak, primulas, pine, bamboo, rhododendrons and various ferns and moss.
Day 1: From NJP/ Bagdogra, travel to Okhrey through Jorethang. You can either stay at Hilley or Okhrey. Hilley has only one homestay with very basic facilities.Okhrey, on the other had has better accommodation options. Hilley is the starting point of the Barsey Rhododendron Trek.Day 2: Start early after having breakfast. The trek is easy and will take around 2 hours to reach the Guras Kunj. Stay overnight at Guras Kunj or the Forest Barrack.Day 3: Wake up early in the morning to view the sunrise at the mountain ranges. Roam about the place and then return back to Hilley. From Hilley, you can return back to Siliguri or Gangtok.
Hilley is one of the entry points to the Barsey Rhododendron Sanctuary and the trek in to the sanctuary starts from here.