IF YOU’RE LOOKING to party, network or support a good cause this week, check out:

TUESDAY

Cellardoor Winery Graceful Release Party, 5:30 to 9 p.m., Grace, Portland. Taste the latest Cellardoor wines, enjoy appetizers and desserts and check out Madgirl’s sculptural dresses. $25. [email protected]

THURSDAY

Bayside Trail Opening Celebration, 4 to 6 p.m., Bayside Trail at intersection with Elm Street, Portland. Join Portland Trails and its partner organizations and check out this latest link in Portland’s urban greenway, while enjoying refreshmens and music. Free. www.trails.org.

MS Harborfest Benefit Auction, 5 to 9 p.m., Ocean Gateway, Portland. Kick off the weekend’s nautical festivities and support the Multiple Sclerosis Society by bidding on hundreds of items in live and silent auctions. $20. 781-7960.

FRIDAY

Bath’s Third Friday Art Walk, 5 to 8 p.m., downtown Bath. Explore the city’s galleries, enjoy refreshments and listen to outdoor music. Free. www.fiveriversartsalliance.org.