Roads leading to Sentinel Peak, "A" Mountain, will close Saturday at 6 p.m.
It's part of the Pinkafy Tucson event to raise awareness and money for breast cancer research.
The Rialto and other buildings in downtown will also turn pink for the night.
Pinkafy Tucson is hosting a rooftop party at Hub to kick off their Real Men Wear Pink season and Breast Cancer Awareness Month.
Tickets are $25 apiece.