Labor Day weekend means it’s time for the Four Corners Motorcycle Rally.

Events will be held all day Friday through Sunday in Durango and Ignacio. Participants can enjoy demo rides, arm wrestling, live music, flat track racing, a hill climb, the parade and much more.

For details and tickets, visit fourcornersmotorcyclerally.com.

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Saturday is your last chance to see the exhibit “Medieval To Metal: The Art and Evolution of the Guitar” at the Powerhouse Science Center, 1333 Camino del Rio.

The exhibit is a touring selection of instruments ranging from the intricately inlaid Moorish oud to the transparent acrylic body of California’s BC Rich guitars. These designs span 4,000 years of history.

The Powerhouse is open from 9 a.m. to 4 p.m. Admission is $9 for children and adults. For more information, call (970) 259-9234 or visit powsci.org.

The Art of Nan Coffey Show Opening, 4-7 p.m., Ska Brewing Co., 225 Girard St.

6 Dollar String Band, 6-9 p.m., Union Social House, 3062 Main Ave.

You Knew Me When, 6-9 p.m., Fox Fire Farms, 5513 County Road 321, Ignacio.

Veterans Poker Run, 8:30 a.m.-4 p.m., La Plata Electric Association, 43 Stewart St., $20 single/$30 couple.

History and Evolution of the Guitar, 2:30-4 p.m., Powerhouse Science Center, 1333 Camino del Rio. Join HP Newquist, director of the National Guitar Museum, to explore the 4,000-year history of the guitar and its evolution as our culture’s most iconic musical instruments.

Ska Brewing 27th Anniversary Party and Brewer's Invitational, featuring Hepcat, Rude Girl Revue and DVRS, 4 p.m., Ska Brewing Co., 225 Girard St.

Rob Webster, 6-9 p.m., Union Social House, 3062 Main Ave.

Pete Giuliani, Farmers Market, 8 a.m.-12 p.m. TBK Bank, 259 W. Ninth Street.

Rockin’ on the River Summer Music Series, 4-7 p.m., Powerhouse Science Center, 1333 Camino del Rio. www.powsci.org.