This weekend is a reminder that summer is not over just yet.

One of summer’s hottest activities, stand-up paddleboarding, takes center stage with events on the Ashley River, Charleston Harbor and at James Island County Park this weekend.

Chucktown Showdown

The inaugural Chucktown Showdown stand-up paddleboard races will be held, with the elite 8.5-mile and recreational 4-mile races, at 9 a.m. Saturday, starting and ending at Brittlebank Park. The elite race will circle Castle Pinckney in Charleston Harbor.

Joe “SUP Joey” McQuaid, the Showdown’s primary race director, expects to draw about 100 racers, thanks largely to prize packages and scenic but challenging courses. The total of all prizes is $5,000.

The fees are $70 for the elite race, $65 for the recreational and $12 for a kids race. The deadline to enter is 11:59 p.m. today. Proceeds from the event go to Special Olympics.

For spectators, organizer and competitor Jeremy Whitted recommends watching the races from The Battery and Waterfront Park.

http://chucktownshowdown.com

SUP championship

On Sunday, the paddling action moves to James Island County Park, where BIC Sport will host the inaugural SUP “One Design” Challenge National Championships on the park’s lake.

The first heat of the races will begin at 9 a.m.

The race will feature participants from more than 200 One Design events nationwide. Other participants are eligible to register via a waiver. The unique “one design” format of this SUP race requires that all participants use the exact same board to level the playing field.

This year’s SUP of choice will be Outside Magazine’s “Gear of the Year” 12’6” WING by BIC SUP.

Racers will be organized into heats and race around a short course in the lake that features multiple buoy turns. The top finishers from each heat will advance, with a final race deciding the winner. Awards divisions will include categories for men, women and youths (ages 6-15). Spectators are welcome and encouraged to cheer on participants at the lake.

The Charleston County Park and Recreation Commission and BIC SUP are partners in the Chucktown Showdown. www.ccprc.com

Montague Mile

The mile run makes a comeback on Sunday evening with the inaugural Montague Mile, a series of seven, one-mile races on Montague Avenue in North Charleston.

Races, to be held 5-7 p.m., will include kids (14 and under), high school (15-18), females (19-39), females masters (40 and up), men’s (19-39), men’s masters (40-up) and elite (invitational).

The event, organized by the folks behind the Charleston Marathon, was the brainchild of longtime local race manager Howie Schomer. “I’ve had all kinds of race ideas in the back of my head, and the mile was certainly one of them,” says Schomer. “I remember how much fun it was to run the King Street Mile years ago and then to watch the other flights, especially the elites. “

The idea for the Montague Mile, he admits, started years ago as an idea to hold a 10K down Rivers Avenue to Northwoods Mall on a Sunday evening in the summer, then followed by a “Taste of North Charleston.”

“I mentioned it to a few of the marathon board members and the response was underwhelming so I just kept it in the back of my mind,” says Schomer, adding that board members were interested in a race featuring a block party finish.

He then pitched the idea for a mile and the board wanted to give it a try. “One of the things that possibly led to the King Street Mile’s demise was possibly the disruption of business on lower King for an extended period of time,” says Schomer. “But the Park Circle area on Sunday evenings is particularly dead, so an influx of people can only be a good thing for the few businesses that are open. “

The race is being modeled after several urban mile road races, including King Street, he said, noting the various flights. The fee to participate is $15-$30. Proceeds benefit the Youth Endowment for the Arts, which provides arts program funding to Charleston County schools.

http://montaguemile.com

Lt. Dan 5K and ride

As part of the Lt. Dan Weekend, put on by actor Gary Sinise to raise money for disabled veterans, runners and cyclists are invited to participate in the Lt. Dan 5K or the Lt. Dan Warrior Ride on Saturday through The Citadel campus and Hampton Park.

The 15-mile “family fun bike ride” begins at 9:30 a.m. with the 5K starting at 10 a.m. Both start at The Citadel’s Johnson Hagood Stadium. The fee is $35 for either the ride or the 5K and includes admission to the concert at 7:30 p.m. that night. (See Pages 18-20 for more on the Lt. Dan Weekend.)

www.ldw4.org

Fitness festival

As part of Sunday’s inaugural Kiawah Island Golf Resort Triathlon, the resort is holding a Get Fit Festival on Saturday at Night Heron Park. The festival coincides with triathlon’s packet pick-up and course briefings.

Among the activities will be yoga, a basketball clinic with College of Charleston coach Doug Wojcik and family fitness activities. The event is free and open to anyone, including those not staying on the island or participating in the triathlon.

Meanwhile, the triathlon has reached its cap of 400 individual and relay registrants.

www.kiawahresort.com/recreation/featured-events/kiawah-triathlon

Reach David Quick at 937-5516 or dquick@postandcourier.com.