Koilabas is a bazaar town situated in Gadhawa Rural Municipality in Dang Deokhuri District in Lumbini Province of south-western Nepal. The to…Koilabas is a bazaar town situated in Gadhawa Rural Municipality in Dang Deokhuri District in Lumbini Province of south-western Nepal. The town is situated on the southern edge of the Dudhwa Range of the Siwaliks, at Nepal's border with Uttar Pradesh 5 km from the village Jarwa on the other side. Indian and Nepalese nationals may cross the border unrestricted however there is a customs checkpoint for goods. Koilabas has regular bus service to Tulsipur on the Gorakhpur-Gonda Loop of Indian Railways.