The Sacramento Law Enforcement memorial motorcycle run will rumble down river to Isleton on July 31. The run, to benefit the law enforcement chaplaincy program and other endeavors, will gather at the Police and Sheriff Memorial, 500 Arden Way in Sacramento, beginning at 8 a.m. July 31. Participants can register and pay the $20 per-person fee for the fund-raising run on the day of the ride or call (916) 993-7786 to register.