Suspected of speeding and driving drunk, a Rohnert Park man crashed into several trees along Armstrong Woods Road, seriously injuring himself and a passenger, the CHP said Tuesday.

Driver Jason Rivis, 27, was arrested on suspicion of felony drunken driving, CHP Officer Jon Sloat said.

Rivis was one of 43 people arrested on suspicion of drunken driving in Sonoma County during the long Memorial Day weekend, according to law enforcement statistics.

Rivis and passenger August Perotti, 38, of Monte Rio were taken to Santa Rosa Memorial Hospital after Saturday's 6:25 p.m. crash. Rivis was flown by REACH medical helicopter.

Although arrested, Rivis was released to the hospital because of his injuries, Sloat said. He was in good condition Tuesday afternoon, a hospital spokeswoman reported.

Perotti, the passenger, was released from the hospital Tuesday.

Rivis had been speeding while headed north on the Guerneville-area road when the car ran off of the right shoulder, shot across both lanes and smashed into the trees, Sloat said.

Two other passengers in the Lincoln sedan were Sierra Halverson, 18, of Monte Rio and Jessica Boughner, 19, of Guerneville. They apparently had no major injuries and didn't require hospital treatment.

During major holiday periods the 13 Sonoma County law enforcement agencies give extra attention to finding people who may be drunk behind the wheel.

Officers this year also arrested seven people wanted on warrants for drunken driving cases, said Petaluma traffic Officer Walter Spiller.

As well as the Guerneville crash, there was one other suspected drunken driving crash with an injury, Spiller said.

During the 2012 Memorial Day weekend officers countywide arrested 53 drivers and reported three related crashes with three people hurt.

You can reach Staff Writer Randi Rossmann at 521-5412 or randi.rossmann@pressdemocrat.com.