Thousands of spectators and participants will be converging on Twentynine Palms this weekend for the 43rd annual Hilltoppers off-road motorcycle Grand Prix. This grand prix is an AMA-sanctioned event and part of the GPR Big Six Grand Prix Series. The gates open at noon Friday, and 6 a.m. Saturday and Sunday. Registration starts at 4 p.m. Friday, April 6, but the races do not start until Saturday. The first race is at 7:30 a.m. both days. Motorcycle riders of all ages and abilities will race on desert courses that include jumps and dips. There will be food, vendors, and fun for all ages. The event will be held at the Twentynine Palms Motorsports Arena, about 3 miles east of the city off Highway 62. Tickets are $20 per day; there are discounts for military and children. For more information visit www.hilltoppersmc.com.