MASSIVE Weekend of Events in Somerville

Did the city's events calendar siphon gas from a speedboat and belch near an open flame, or something?

If you're looking for something to do in Somerville this weekend, prepare for an explosion of riches.

There are six festivals, including Riverfest, Dogfest, the Boston Comedy Festival, Oktoberfest, a film festival and an African festival.

You can also dance under the McGrath Highway, climb a tractor, see a leading singer perform and run in a road race.

Here's what's going on:

Riverfest will feature eight live bands, seven food trucks, fireworks, performances and activities for children, an Edsel car show and more. It takes place in Assembly Square Saturday from 12 p.m. to 9 p.m. See the .

If you love dogs, don't miss the third annual , which features the popular doggy fashion show with a prize given for best dressed dog. There's also a best trick contest, demonstrations from the police K9 unit, Frisbee dogs, "try it" workshops for Somerville dogs and their owners, food, a silent auction and more. The festival begins Sunday at 10 a.m. at . There's more at somdogfest.org.

The Boston Comedy Festival is bringing several top comics to Somerville this weekend and next week. On Saturday, Jimmy Tingle and Andy Kindler will be at , and on Sunday the best standup competition begins with preliminary rounds. .

is hosting a traditional outdoor Oktoberfest Biergarten Saturday from 12 p.m. to 6 p.m. The parking lot of the Magoun Square CVS will turn into a Biergarten with six beers on tap from Germany's Paulaner Brewery, and people can eat traditional German fare such as Bratwurst and Jägerschnitzel.

The Damba Festival is one of the most important events in Ghana, featuring music, performances and a celebration of culture and religion. is hosting a three-day Damba Festival with concerts, pageantry, symposiums and a talk by a former Ghanian vice president. You can and find a schedule of events at worlddamba2012.org.

Dar Williams at Somerville Theatre
Dar Williams, a singer-songwriter, performs at  at 7:30 p.m. Saturday.

Etheria Film Festival
The Etheria Film Festival features new short science-fiction and fantasy films directed by women. There will be screenings of films by Mexican, Italian, American, Australian and Canadian filmmakers. It takes place Saturday at from 4 p.m. to 10:30 p.m. Afterward there will be an afterparty.

The Brian Higgins Foundation supports children with special needs and their families. On Sunday the foundation is hosting its annual Half Way to St. Patrick's Day roadrace. It begins Sunday at 10 a.m. at in Ball Square.

Dancing under McGrath: Project MUM
Project MUM, "meet under McGrath" takes place Sunday at 1 p.m. Basically, it's a dance party under the McGrath Highway. More here.

Climb a tractor, eat maple cotton candy, hang out around hay bales and celebrate local agriculture at the Union Square Farmers Market Saturday. There will be music all day.

The Somerville Garden Club hosts its annual perennial and house-plant sale Saturday beginning at 9 a.m. Certified master gardeners will be on hand to answer questions, and proceeds from the sale will support the Garden Club. It's at 4 College Ave. in Davis Square.

Children's book author Margaret Muirhead will read from her book, "Mabel One and Only," Saturday at 10 a.m. at the .