Reference: ad-Durar an-Naadhirah fil-Fataawa al-Mu’aasirah – Page 451
‘Abdul-‘Azeez Aal ash-Shaykh – ad-Da’wah 1543, Muharram 1417AH
Question: What is the ruling regarding looking at women during the Hajj?
Response: Looking at women for whom you are not a mahram is prohibited during the Hajj and other than it; However, its [level of] prohibition is greater during the Hajj.