Two very different events, one involving mud and the other sand, are looking to draw about 1,000 people each this weekend, and that’s just half of it. The other events involve water and beds.

In other words, after a week of more normal Charleston weather, spring is here with something for everyone.

Mud

Saturday’s Mega Mud Run Challenge kicks off the first of three consecutive Saturdays featuring a mud and obstacle course race. The others are the 17th annual Citadel Bulldog Challenge on April 20 at The Citadel and Project Mud 5K on April 27 on Wadmalaw Island.

But there’s something different about the Mega Mud Run.

Unlike the Citadel Bulldog Challenge, a fine-tuned, military-style race, and the out-of-town franchise Project Mud, the Mega Mud Run is a bit more personal.

The run is the fruit of the labors of Glenn Herring, a local who has promoted physique, strongman and MMA fights in the past. He literally built the obstacles on a longtime family farm on Johns Island.

The Legare family has been supportive of Herring’s efforts.

And all that work and cooperation is paying off. On Monday, Herring said, the Mega Mud Run has grown from the 187 people who participated in a sort of trial run last fall to close to 1,000. And participation isn’t the only part that’s grown.

Herring has nearly doubled the number of obstacles from 18 to 35 on the 3.5-mile course. Nine involve mud.

“I’m right where I wanted to be with this event,” said Herring, adding that the fall event will be Sept. 28.

Gates open for the event at 7:30 a.m. Packet pick-up starts at 8 a.m. Teams start at 9 a.m. and individuals at 10 a.m. The race-day fees are $125 for individuals, $240 for teams of four. Spectators get in free and parking is free. Participants must be age 18 or older.

www.megamudrunchallenge.com

Sand

The fourth annual Run for Adela, a tribute to Adela Holmes Cook, also is edging toward 1,000 registrants for the only run held on the beach of Sullivan’s Island.

Cook, a Bishop England High School student who was planning to attend the University of South Carolina, died from injuries sustained in a golf cart accident in 2009 during a trip in the Bahamas. Family and friends say she loved the outdoors and was an avid runner. They created Run for Adela and the Adela Holmes Cook Foundation to honor her memory and raise money for charity.

Race director Dicksie Johnson said this year’s event will help pay for “Adela’s Extreme Teen Water Weekend” for 20 youths with cancer through Camp Happy Days, as well as Charleston Waterkeeper.

The race starts and ends at Station 16 and features an array of prizes, including a weekend getaway at Wild Dunes Resort, bicycles, gift certificates and more.

New this year is a one-mile fun run for children ages 12 and under, a spirit contest for schools with the most participants (the top high school gets $1,500 and the top lower school gets $1,000) and an “official after-party” at Triangle Char & Bar in Mount Pleasant, starting at 10:30 a.m. The party includes music and food and drink specials.

Late registration and packet pickup will be 10 a.m.-6 p.m. Friday at On the Run, 920 Houston Northcutt in Mount Pleasant, and 6:30 a.m.-7:30 a.m. Saturday at Station 16 on Atlantic Avenue on Sullivan’s Island. Participants are asked to carpool and to not to bring pets.

runforadela.eventbrite.com

Water

The third annual Patriot Challenge on Saturday features two races for paddlers, including kayakers, stand-up paddleboarders and more, on the Ashley River to raise money for local wounded veteran paddling programs.

The races include a six-miler from Brittlebank Park out to the harbor and back and a three miler, 1.5 miles up the Ashley and back.

Registration is 8-9:30 a.m. Saturday with a captain’s meeting at 9:30 a.m. and launch at 10 a.m.

Prizes include an Epic Kayak drawn by lottery, though only paddling participants are eligible for the drawing. Other prizes for raffles include Epic carbon paddles, beach totes, dinner at Charleston restaurants and more.

www.charlestonpatriotchallenge.org

And beds

Called the “second most fun you can have in bed,” the Charleston Bed Race certainly is a hoot to watch. The fourth annual event will be 1 p.m. Sunday at Hampton Park.

The entry fee is $125 per bed, which will be judged in the categories of fastest, slowest, best decorated, most outrageously decorated and the “What Were you Thinking?” The People’s Choice award is everyone’s all-time favorite.

Winners are determined by the teams’ race time and will be judged in heats of two beds completing a distance of about two city blocks. The fun continues until a champ is declared.

The event benefits Camp Happy Days, a camp for children with cancer and their families. Last year, 1,100-plus people attended, and the organization raised more than $16,000.

www.charlestonbedrace.com