According to the official Wildstar web page, between pre-order going live and launch, players will be able to participate in four beta weekends. While everyone else will be required to obtain a key to participate in the beta weekend, players who pre-order the game will have immediate access to each event. The currently scheduled weekends are:
 

• Friday, March 21st, 7:00AM PDT through Sunday, March 23rd, 11:59PM PDT
• Friday, April 4th, 7:00AM PDT through Sunday, April 6th, 11:59PM PDT
• Friday, April 18th, 7:00AM PDT through Sunday, April 20th, 11:59PM PDT
• Friday, May 2nd, 7:00AM PDT through Sunday, May 4th, 11:59PM PDT
• Open beta starts on May 8th, 2014, and runs through May 18th
• WildStar Ops Week