Bike Friendly Oak Cliff meets at 7:30 p.m. Friday at Eno’s for a ride over the bridge to Aurora.

The first of three Día de los Muertos celebrations in Oak Cliff is from 3-8 p.m. Saturday at the North Oak Cliff Library. A second one is Wednesday, Nov. 2, in the Tyler/Davis District.

Halloween Nights at the Dallas Zoo are from 5-8 p.m. Thursday-Saturday, Oct. 27-29. Activities include trick-or-treating, a haunted carousel, a trip to the reptile house and a stage show. Admission is $10, which includes candy and coupons.

The final Cyclesomatic event of 2011 is “Spooky Cross”, a cyclocross race, which starts at 10 a.m. Saturday at Rosemont Elementary School.

Pop-up bar 828, at 828 W. Davis, is throwing a Halloween costume party starting at 9 p.m. Saturday. Donate $50 and all your drinks are complimentary. Organizers report they have raised $2,000 so far for Oak Cliff-based Promise House.

Tyler Street United Methodist Church’s Trunk or Treat celebration is from 4-7 p.m. Monday, Oct. 31.

Oil & Cotton hosts a haunted house Monday, Oct. 31, from 6-8 p.m. Admission is $1 and goes toward providing scholarships to Oil & Cotton classes for children who could not otherwise afford them.