1965 आव बेखौ हाग्रा जिब सेन्क्चुएरी होनना फोसावनाय जादोंमोन आरो 1977 आव नेशनेल पार्क फोसावनानै बेनि थाखोखौ जौगाहोनाय जादोंमोन ।
In 1965 AD it was declared wild life sanctuary and in 1977 AD its status was enhanced by declaring it a National Park .