Umi Shoes 2014 San Diego Zoo Sweepstakes-ends on Sunday, May 4, 2014 at 11:59 p.m. CDT. Win a trip for 4 to San Diego & an inside tour of the San Diego Zoo! Limit One (1) Entry per person, per household or address, per email address, regardless of entry method. The Sweepstakes is open only to individuals who are (i) permanent legal residents of the 48 continental United States or the District of Columbia and (ii) who are at least 18 years of age or older at the time of entry. Click Here for Rules!