George Avram from Danville wasted no time making a run up the mountain with his sons and their friend to hit the sledding slopes.
VIDEO: A rare sight in the Bay Area - snow-covered hillsides and mountains!
"I said let's go, grab the sleds and here we are," said George Avram.
A fresh snowfall on Mt. Diablo doesn't happen very often.
"I remember when I was in third grade I was too young to come up here, it feels great to sled up here now," said Kushal Bhanderi from Danville.
PHOTOS: Snow flurries fall in Bay Area
Rangers say about 2 inches of snow fell overnight near the summit of Diablo.
It didn't stop some brave cyclists from plowing and pedaling through it, uphill.
Seriously? We saw this guy pedaling up #snow covered #MtDiablo today. Rangers say about 2 inches fell at summit. ❄️ @LiveDoppler7 @DrewTumaABC7 @DionLimTV #WinterWonderland #BayAreaSnow2019 pic.twitter.com/F0F1DlcNfH— Cornell Barnard (@CornellBarnard) February 11, 2019
There was enough snow to impress some students from UC Berkeley.
"I'm from Colorado. When I heard there was snow I imagined a tiny patch, but as someone from Colorado I approve, it's real snow!" said UC Berkeley student Vani Topkar.
The lines were long getting into Mt. Diablo State Park throughout the day.
RELATED: Snow blankets Bay Area peaks
Park rangers closed the road about a mile from summit to cars because it wasn't plowed and hazardous.
Visitors were still allowed to walk to the top, which many did!
See more snowy stories, videos and pictures.