The Raiders crack open their season Sunday afternoon at the Coliseum when the Bengals come to town. Meanwhile, the Vikings will visit, taking on the 49ers for some Monday Night Football at Levi’s Stadium. And with that, here’s your weekend watch.

The Ghirardelli Chocolate Festival is Saturday and Sunday at Ghirardelli Square. Attendees can experience chocolate school, see chef demonstrations and much more during this annual fund-raising event in San Francisco. MORE INFO

The Mountain View Art and Wine Festival is all weekend on Castro Street between El Camino Real and Evelyn. The 50 Tour: Champions of the Bay will make a special appearance so fans can see all the Super Bowl trophies won by the 49ers and Raiders. MORE INFO

Six years strong, Oakland Pride 2015 is set for Sunday. The parade kicks off at 10:30 a.m. at 14th and Broadway. The festival is at 20th and Broadway that starts at 11 a.m. Entertainment includes Ruthless Records RB diva Michel’le MORE INFO

San Francisco Opera in the Park is Sunday at Sharon Meadow in Golden Gate Park. Thousands will gather at the beautiful outdoor venue. The event is free for all and starts at 1:30 p.m. MORE INFO

The Marin County Home Show is set for this weekend at the Marin Civic Center and Exhibit Hall features free admission, free parking and plenty of expert advice on ideas to refurbish your home and garden. MORE INFO

On the college football front, both Cal and Stanford play at home this weekend.