Beas Kund nestled in Himachal Pradesh, the trek starts from Manali. So if you are coming from Delhi than first you have to reach Manali from where the journey to Beas Kund trek starts. From Delhi you have many options to choose you reach Manali.
If you are travelling by bus than you can reach in 12 to 13 hours from Delhi to Manali. Delhi to Manali distance is about 564 kilometers. The route from Delhi to Manali by road travel is a long journey and can be tiring though the route is beautiful.
If you are travelling by train than the route goes like that, the nearest and most convenient railway station for Manali is Ambala, Chandigarh and Kalka railway station. Delhi to Ambala, Chandigarh and Kalka a lot of Train Service are available that can be chosen to reach. Delhi to Manali can be reached by train nearest broad gauged railways stations are located at Chandigarh. Delhi to Chandigarh distance can be covered in 5 hours by railways. Distance between both of the location is 257 kilometers.
If you are planning your Beas Kund Journey from Delhi then fiest reaching Manali is the task, so by air the nearest airport is Bhuntar, 50 kilometers away from Manali. Air India flights connect Bhuntar with Delhi and Chandigarh as you reah the airport then, there are lots of option like taxi till Manali. These are taxi services available between Bhuntar and Manali. Other near airport is at Dharmshala, Chandigarh and Shimla.