Things are heating up this weekend as San Francisco hits the 70s (helloooo early Summer!) and the city gets extra earthy. Packing the streets with big name bands, naked bikers, free parks, parades, and plenty more - this Saturday and Sunday it's time to get outside and go get your green on. Read on below for San Francisco's best 2012 Earth Day Bashes.

San Francisco Earth Day Festival feat. Big Brother & The Holding Company
The "Greenest City in North America" always does it up big. This year, that means an Earth Day celebration with two stages of live music, a Speaker Dome, a Chef Demo, and plenty of green and local vendors. Wash down that Bi-Rite grub with a House Kombucha, then hit up the Earth Mother Stage at 5pm to catch SF legends, Big Brother and the Holding Company.

Location: Civic Center
Date: Sunday, 4/22 (10am - 6pm)
Website: earthdaysf.org

World Naked Bike Ride: Earth Day Edition
Go au natural this Earth Day with the second World Naked Bike Ride of the year. This time around they'll be cruising through downtown SOMA and the Embarcadero, with a quick pitstop at the Civic Center Earth Day Festival. And don't worry - you choose how much you lose (and how much you put on), be that bikinis, tuxedos, body paint or nothing at all!

Location: Jane Warner Memorial Plaza
Date: Sunday 4/22 (10am - 3pm)
Website: Facebook Event

National Parks Week
Get out of the city and breathe some fresh air with the kickoff of the 2012 National Parks Week. Gain access to Muir Woods, Death Valley, Yosemite, and more for free all week. Pack that tent and get out into the great outdoors.

Location: National Parks
Date: Saturday 4/21 through Sunday 4/29
Website: nps.gov/npweek

Earth Day Block Party & Beach Clean Up
Take your Earth Day party to the beach this weekend with Trumer Pils and SF Surfrider as they host an Ocean Beach clean-up and block party. Catch live music, chow down on local food trucks and other vendors, and sip some drinks from Trumer and Green Bar Spirits. Beach cleanup lasts from 10am till noon.

Location: Ocean Beach
Date: Sunday 4/22 (10am - 6pm)
Website: Facebook Event

Ghirardelli Goes Green
Ghirardelli Square busts out their fourth annual free Earth Day event with live local music plus dozens of green vendors and activities. For the foodies, chefs will be teaching sustainable cooking classes.

Location: Ghirardelli Square
Date: Saturday 4/21 (1pm - 5pm)
Website: Facebook Event

Northern California Cherry Blossom Festival
Blend your Earth Day celebrations with Asian tradition for the 45th annual California Cherry Blossom Festival. The second largest cherry blossom festival outside of DC, the event will play host to food vendors, cultural performances, martial arts, live music, and a Grand Parade at 1pm on Sunday.

Location: Japantown (at Post & Buchanan)
Date: Saturday 4/21 & Sunday 4/22 (11am - 8pm)
Website: nccbf.org