The 44-year-old Fred Hall Show at the Del Mar Fairgrounds is the largest outdoor recreation show in the nation’s fifth largest county. The show features nearly 500 booths and hundreds of boats. Over 200 outdoor recreation seminars will take place over the four-day event. Hours are noon-8 p.m. March 26 and 27, 10 a.m.-8 p.m. March 28 and 10 a.m.-6 p.m. March 29. Visit fredhall.com/san-diego/ for more information.