SAE Boxing tourney is one of the oldest and largest fraternity events in the country.

The three day event attracts 3,000+ students from all over the south east. It has been going on annually for the last 28 years occurring in the last week of February or the first couple weeks of March. In 2012, SAE Boxing Tournament is March 8th, 9th, and 10th.  The tickets are $15 a night or $35 for the 3 nights and the proceeds normally raise over $70,000 for charity.
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Update:

The Double Decker Arts Festival is definitely the most exiting weekend at Ole Miss in the spring. “Taking its name from the town's authentic double decker bus imported from England in 1994, the festival brings together visitors and residents alike for a daylong celebration of music, food, and the arts held on the picturesque Courthouse Square of Oxford Mississippi.” Double Decker has been known to draw more than 50,000 people in attendance; making it another Mississippi spring day that you cannot miss!

Want to see overweight, out of shape High School Heroes strap back on the pads? How about beautiful sorority girls competing for the cheerleading championship?

The St’ Patty’s Day Parade in Baton Rouge is one of the biggest St’ Patty’s day celebrations in the country and a great reason to head to LSU for a weekend. The parade starts at 10:00 A.M. on March 14th, 2009 and will be a rocking party all day long.

If you are a Bama fan, wish you were, or just want to head to T-Town for an awesome weekend then this is the time to go. The Crimson Tide had a great season last year as they rose back to being a top competitor at a national level.
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This is the biggest event of the spring at Bama and draws fans from all over the South. It is very similar to going to a Bama game during the fall except for one major difference, everyone everywhere you look is a Bama fan.

Volapalooza is a free concert hosted at Fiji Island in Fraternity Park at The University of Tennessee. This annual event normally takes place at the end of the school year and draws about 1,000 UT students for the night of fun. In the past the All Campus Events committee has been able to bring in some pretty big bands like Ben Folds, Cake, and Dashboard Confessional.

 
 
Row Week at the University of Arkansas – Fayetteville

Each spring, a phenomenal music opportunity draws thousands to the University of Arkansas – Fayetteville campus.  Students gather just before finals to celebrate and enjoy a variety of music from country to urban to hip-hop and more.

UVA SPRINGFEST 2011 on Nameless field

UVA Springfest is one of the biggest events hosted at UVA each year. It is a huge concert held at Nameless field in late March or early April. They have had some great acts in the past like Ben Folds and Ok Go. They have not announced who they have this year yet, but continue to check back here or post it in the comments if you find out.

Vanderbilt’s Rites of Spring concert, or “Rites” as VU students like to call it, is an annual concert series hosted on campus to celebrate…you guessed it…the start of spring.

It is hosted on Alumni Lawn which also plays host to Vanderbilt Graduation and other large events. It is the perfect area because it is in the center of campus and surrounded by picturesque trees. In the past, Rites has hosted big name bands creating an excuse for students to have a 3-day party instead of studying for finals.

It draws a huge crowd

Halloween is enormous in Chapel Hill. The city shuts down the main drag, Franklin Street, and people from all the surrounding towns and colleges descend upon Chapel Hill for a night of debauchery. It is a really fun time as there are often upwards of 80,000 in the streets enjoying themselves.