Nashoba Valley Ski Area in Westford, Mass., is offering $50 off all season passes purchased before Nov. 15.

The Unlimited Season Pass, valid for unlimited skiing day and night seven days a week through the season costs $550 until Nov. 15, then goes up to $600.

Nashoba also offers an additional $50 off each additional pass. For example, the second Unlimited Pass bought now costs $500; the third, $450; the fourth and subsequent, $400. Those prices also go up after Nov. 15.

Unlimited Junior Passes (12 and under) cost $500 before Nov. 15, then $550.

Twilight/Night Season Passes, valid 3 to 10 p.m. seven days a week, cost $375 before Nov. 15, then $425.

Weekday Season Passes, valid 9 a.m. to 5 p.m. non-holiday weekdays, costs $305 before Nov. 15, then $355.

Weekday Morning Season Passes, valid 9 a.m. to 1 p.m. non-holiday weekdays, costs $200.

Sunday Night Passes good 5 to 10 p.m. all Sundays through the season cost $145.

Seniors 60 and over, and children 5 and under, have a special set of passes. All are $200 before Nov. 15, and increase after that to $325 for Unlimited Passes; $310 for Twilight/Night Passes; $250 for Weekday Passes.

More information. Or call 978-692-3033.