Even though the main Gaṅgā river does not flow through the Vaiṣṇo Devī area, there are holy streams connected to the Gaṅgā right at the pilgrimage site:
Caraṇagaṅgā: Inside the cave of Mātā Vaiṣṇo Devī, a holy stream of water called Caraṇagaṅgā flows right under the three piṇḍīs. This water naturally flows around and washes the piṇḍīs before coming out of the cave. Devotees joyfully collect and drink this water as caraṇāmṛta.
Bāṇagaṅgā (or Bālagaṅgā): On the walking path to the Bhavan, there is a holy stream called Bāṇagaṅgā. The story says that when Mātā Vaiṣṇo Devī was walking to the cave with Lord Hanumān, he felt very thirsty. Since there was no water around, the Goddess shot an arrow (bāṇa) into the ground. This caused a stream of the Gaṅgā to appear so he could drink. The Goddess also washed her hair (bāla) in this stream, which is why it is also called Bālagaṅgā.