Don’t expect Matt Holliday and the Colorado Rockies to be intimidated by the Green Monster.

Back in June, long before their historic surge to an unlikely NL pennant, the baby-faced Rockies roared into Fenway Park and took two of three from the Red Sox – outscoring them 20-5.

Colorado handed Josh Beckett his first loss, got a grand slam from Garrett Atkins and a nice outing from Jeff Francis. So the Rockies already know they can play with the big boys from the American League.

Now, they get another chance to show their stuff – on baseball’s biggest stage – when the World Series opens Wednesday night in Boston.

Fenway franks and Rocky Mountains. Ski slopes and baked beans. Not a bad act in October.

There might even be some snowballs mixed in with the fastballs and curves that Curt Schilling, Manny Corpas & Co. are throwing.

“I played street hockey in Canada,” Francis said. “Do you think some snow is going to bother me?”

The Rockies wanted to work out Sunday at Coors Field, but a snowstorm forced their hitters inside. The forecast was for mild weather the rest of the week in Denver, with the Series shifting to Colorado for Game 3 on Saturday.

“It could be 80 degrees in a week, so I’m not concerned about that,” Rockies star Todd Helton said.

But hey, Boston can be awfully chilly this time of year, too.

“That’s real cold out there, it sort of bites you a little bit back East,” Helton said. “But we don’t care. We’re playing in a World Series. Weather’s not going to be an issue.”

Troy Tulowitzki, Kaz Matsui and the Rockies drew paltry television ratings in the NL playoffs. A few more fans will surely tune in to see if Colorado can extend its hard-to-fathom string of 21 wins in 22 games.

For the wild-card Rockies, it’s their first World Series. For Manny Ramirez, David Ortiz and the hardened Red Sox, they’re looking for their second championship in four seasons after ending an 86-year title drought in 2004.