Yes Himalaya and it's ranges are mentioned in Rig-Veda Samhita. The Himalayas is called "Himavanta" during Vadic Times.
यस्येमे हिमवन्तो महित्वा यस्य समुद्रं रसया सहाहुः |
परदिशो यस्य बाहू कस्मै देवाय हविषाविधेम || RV 10.121.4
yasyeme himavanto mahitvā yasya samudraṃ rasayā sahāhuḥ |
His, through his might, are these snow-covered mountains, and men
call sea and Rasā his possession: His arms are these, his are these
heavenly regions. What God shall we adore with our oblation?
According to the book - Vedic Index of Names and Subjects , Volume 2; Volume 5 by
By Arthur Anthony Macdonell, Arthur Berriedale Keith.
This mountain range is what is Himalayan Range.
There seems no reason to deny that in all the passages the word refers
vaguely to the mountains now called Himalaya.