Get a jump on Halloween weekend by signing up to run through Tucson’s downtown — costume optional. Those who have sneaked into mega-sized bags of candy bought for trick-or-treaters may want to opt for the half-marathon.

The lineup: You can run or walk a 5K on Saturday, Oct. 29, or you can tackle the TMC “A” Mountain Half-Marathon on Sunday, Oct. 30. There is also a free children’s mile on Saturday and live music on the main stage.

Background: Get Moving Tucson started 11 years ago downtown. In 2012, organizers added the TMC “A” Mountain Half-Marathon, a 13.1-mile run that starts downtown, with runners, joggers and walkers going up “A” Mountain, then back down and along the Santa Cruz River path—this year passing three bands on their way to the finish line.

The events are held by Southern Arizona Roadrunners, and as of Tuesday had drawn more than 700 people in the 5K, 100 kids to the fun run and 900 to the half-marathon, said Randy Accetta, the race director. As of Tuesday, there were also more than 200 volunteers.

That’s a lot of numbers. Here’s some more:

1—Giant penguin leading the new costume contest on Saturday.

1—Age of the youngest registrant.

1— Official starter, Tucson Mayor Jonathan Rothschild.

2—Number of Prep and Pastry $50 gift cards to the costume contest winners.

2—Number of 2016 Gabe Zimmerman Triple Crown races won by Flagstaff runner Andrew Lemoncello, who will be racing the half-marathon.

3—Third leg of the 2016 Gabe Zimmerman Triple Crown

4—Number of local bands playing for runners on race weekend: Chuckwalla, Mary and the Flathead Band, Jukebox Junkies and Bold as Love.

6.9—Miles from the starting line to the top of “A” Mountain.

7—Number of years TMC has been the title sponsor.

25—Official virtual runners.

25—Number of Porta-Johns.

29—Number of people age 70 and over.

40—Team Hoyt angels and captains (a wheelchair running program for children).

55—Coaches of the Girls on the Run

79—Age of oldest person registered as of Tuesday.

150—FitKidz Children running for free.

200—Total dollars of prize money available to the woman and man who get to the top of the “A” Mountain first.

240—Girls on the Run, a youth development program for girls in third through eighth grade

809—Gabe Zimmerman Triple Crown participants.

10,000—meters that runners will travel from the top of “A” Mountain back to downtown.

16,000—Dollars raised for Child and Family Resources, Reid Park Zoo’s educational programs, Team Hoyt and the Southern Arizona Roadrunners.

Source: Randy Accetta.