Lance Armstrong -- Hit 2 Cars, Blamed GF ... Cops Say

Lance Armstrong has disgraced himself all over again ... so say police who claim the cyclist hit two parked cars after partying in Aspen ... and then let his GF take the blame.

According to the Aspen PD, Armstrong's SUV was identified in the December 29th incidents -- and upon questioning, Lance's GF Anna Hansen initially told cops she was the driver that night.

She also told the investigator that she and Lance had been driving home from an Aspen Museum Party at the St. Regis Aspen Resort ... and didn't want Lance to drive because he had been drinking.

According to the police report, Anna told cops she lost control of the SUV and struck two parked cars ... then returned to the scene on foot moments later and told the owner of the vehicles she'd pay for the damage.

But the investigator didn't buy Anna's story ... and contacted the valet company that worked the party that night.

The valet told cops ... he specifically remembered helping Anna into the PASSENGER seat after the party and Lance WAS THE DRIVER.

**Cue Perry Mason music**

When the investigator confronted Anna with the new info, she "became upset" ... and said that they had stopped at a market on the way home and traded seats, so she drove.

The investigator still wasn't buyin' it.

Get this ... two days later, Anna changed her story AGAIN ... and finally admitted Lance was driving that night. But now she insists he was NOT drinking at the time.

According to cops, Anna said ... "He was not intoxicated, and that was um, you know, I’m sorry I lied to you that morning but I was trying to make [it] sound like, well, I was driving because that was, just, I don’t know … I was just trying to make something up at that time."

As for Lance, he was hit with two citations. He's due in court on March 17th.