With a broad range of music, from folksy blues by Pony Bradshaw to the electronic rock the trio LANY -- out touring the festival circuit in support of its new single, “Super Far,” the festival drew music lovers from all over, including younger fans from Southern California.

Reilly O’Brien, 22, and her brother Nick, 19,

Gray skies and scattered drizzle couldn’t keep music fans from streaming in the gates of the Napa Valley Expo grounds Friday morning for the opening day of the 6th annual BottleRock festival.

The party got off to a solid start with bands taking each of the festival’s four music stages promptly at noon, including Sebastopol’s popular America singer-songwriter David Luning and RIVVRS, aka Brandon Zahursky, a singer and songwriter who lived and worked in Napa Valley for several years.

Big names scheduled for evening shows Friday include Muse and The Chainsmokers. The festival closes Sunday night with Bruno Mars.

Today’s forecast includes a high of 65, a low of 51 and a 20 percent chance of rain, festival publicist Monty Sanders said. The weather is expected to get increasingly warmer during the three-day festival, with highs in the 80s.

Attendance is expected to rival last year’s count of 40,000 a day.

You can reach Staff Writer Dan Taylor at 707-521-5243 or dan.taylor@pressdemocrat.com. On Twitter @danarts.