This is the 18th year that the Rotary Club of Alpharetta has produced The Mayor?s Challenge with the support of the City of Alpharetta. This year is the third year the race will be at historic downtown Alpharetta. The race check-in begins at 6:00 p.m. The fun run will begin at 7 p.m. with the 5K race beginning at 7:30 p.m. Make sure to pack your lawn chairs to stay after the race, because there will be great live music for the block party that will go on until 9pm!