More than 100 boats are expected for the Carolina Yacht Club Open Regatta that will be sailed Saturday and Sunday in Charleston Harbor.

That number would have been higher, but a number of sailors who normally participate will be competing in Wrightsville Beach, N.C., where the Lightning fleet’s Atlantic Coast Championships will be sailed.

The Carolina Yacht Club Regatta is the fourth open regatta of the season. The final event of the summer sailing season is the Rockville Regatta scheduled Aug. 3-4.

Registration is 5-6:30 p.m. today and from 9-10:30 a.m. Saturday. Racing is scheduled to begin at 12:25 p.m. Saturday and noon Sunday over three courses.

The event is open to all one-design boats with a minimum of four boats constituting a class. Last year’s Carolina Yacht Club Regatta featured 13 classes.

Special awards include the Henry Clay Robertson IV Trophy that goes to the top sailor 16 or younger and the Philip O’Neill Hanvey Memorial Trophy for sailors under 21 based on integrity, sportsmanship, competitiveness and love for sailing. John Seibels won the Robertson award last year, and Derrill Hagood won the Hanvey award winner.