The alcohol and drug free event was created in 1984 by parents and community leaders to serve as an alternative to dangerous celebrations.
SAN traditionally draws about 350 students.
The evening begins at 6 p.m. with a barbecue and games at Fuller Lodge for each senior and one guest.
The evening includes large inflatable games, tipsy golf carts, video games, billiards and foosball, racquetball, climbing, Wild West photos, a Games Night, auction, street carnival, circus performers, movies at the Reel Deal and a breakfast at the Betty Ehart Senior Center.
Students must have a key pass to attend the event, which is given out at graduation.
Seniors who go to every event and get a ticket punched are eligible for grand prize giveaways at the morning breakfast.
Students who should be graduating this year but do not walk must call Jeremy Smith at the YMCA for instructions at 662-3100.