From Yerushalayim, take Superbus line 183 (to Ksalon), get off in Ramat Raziel. Walk from there to Eshtaol (on the Beit Shemesh road, road 38). You start off by following the road (road 395) for about 15 minutes, then at a place where the road drops sharply and turns left and there are some benches and signs, you turn right and follow the path that goes around the hill and gradually down into the valley.
At the end, you turn left and see a bus stop 200 meters ahead of you where bus 415 back to Jerusalem stops every 30 minutes (and moniot sherut as well).
This walk is especially beautiful during late afternoon / early evening, watching the sunset from the mountain side. It’s about 2-3 hours of walking over light roads with beautiful views. It’s just walking down, easy for children as well.