Running is at the top of popular sports on Long Island. Runners by the hundreds, and sometimes thousands, of all ages and abilities step up to starting lines almost every weekend morning.

5k run/walk to benefit camp scholarship and pancreatic cancer research, held at Field 2.

5k run/walk to benefit Parkinson’s programs.

Student-led run to promote mental health awareness, fun run for ages 10 and younger begins at 8:30 a.m.

Check-in starts at 8 a.m., 1-mile run starts at 9 a.m., 5k run starts at 9:30 a.m.

5k benefiting Long Island facilities raising awareness and support in the fight against drug addiction, in memory of C.J. Neumann.

5k race begins at 7 p.m., all races preceded by kids fun run at 6:30 p.m., meet at field house near Parking Field 2.

5k through the trails of Planting Fields Arboretum, featuring music and light refreshments.

5k to honor Plainview resident Rebecca Koltun, fun run begins at 8 a.m.

5k to benefit the Never Stop Running Foundation, children’s fun run begins at 8:30 a.m.

5k in honor of Tech. Sgt. Dashan J. Briggs, benefits high school scholarships, workshops and seminars, 1-mile fun run begins at 8:30 a.m.

5k to raise awareness for those living with mental health issues and help reduce the stigma surrounded by it.

10-mile race on the boardwalk, dedicated to the memory of race founder Ralph Kaplan.

5k run/walk and 1-mile walk to benefit the New York Cancer Foundation, featuring live entertainment and a glass of wine at the finish line.

5k run/walk to pay tribute to veterans past and present, kids fun run begins at 8 a.m.

5k to benefit local individuals and families impacted by breast cancer.

5k to benefit the Economic Opportunity Commission of Nassau County.

5k to benefit peer-to-peer programs for veterans facing the challenges of PTSD and traumatic brain injury (TBI), compete for medals by age grouping or just stroll through the beautiful pine barrens.

5k to benefit the Richard M. Brodsky Foundation, toddler run for ages 4 and younger at 8:30 a.m.

5k to benefit the Bayville Elementary Parent Council.

5k through historic Miller Place and past Mount Sinai Harbor, 1-mile fun run begins at 8:15 a.m.

5k to benefit local middle and high school LGBTQ clubs, hosted by the North Babylon Teachers' Organization.

Men’s mile begins at 10:30 a.m., women’s mile begins at 11 a.m., benefits the East Hampton Boys and Girls Varsity Cross Country Team.

5k to benefit the Nissequogue River State Park Foundation.

Check-in 5-6:30 p.m., featuring a post-race party, held in Picnic Area #6.

Check-in 7:30-8:45 a.m., 200-meter kids’ fun run at 8:30 a.m., 5k run/walk at 9 a.m. Benefits Sayville High School scholarship.

Walk to raise awareness for Alzheimer’s disease and other forms of dementia, honor and remember those impacted by the disease and provide support and services to families on Long Island. Featuring breakfast, lunch and live entertainment. Donations will be accepted.

5k to honor multisport athlete Michelle Bonura, benefits the Tesla Science Center, young athletes and scholarships. Kids fun run starts at 8 a.m.

Race to benefit organizations that aid and assist in the eradication of veteran suicide.

5k run/walk to benefit research and raise awareness for ovarian cancer.

8-race series hosted by the New York State Office of Parks, Recreation and Historic Preservation.

5k race to benefit local police and their families, check-in 5:15-6:45 p.m., 1/4-mile kids fun run starts at 6:15 p.m., held at Field 2.

5k run/walk through Camp Hero, finishing at the historic Montauk Lighthouse, check-in 7-8:30 a.m., benefits two local women’s cancer organizations.

Hosted by St. Anthony’s Roman Catholic Church, fee includes post-race food and drink.

5k memorial scholarship run/walk, benefits the Hempstead Police Activity League, featuring health fair and Western beef cook-off.

5k run/walk to benefit the Community Ambulance Company.

5k run to honor FDNY Deputy Chief Ray Downey, who died on 9/11.

5k run, walk, stroller walk for the awareness of parental mental health, rain or shine. All proceeds to benefit the essential programs and services of the Postpartum Resource Center of New York.

Fun run starts at 8:30 a.m., 5k run/walk starts at 9 a.m., benefits the Sayville Fire Department.

Both the 10k run and the 5k walk begin going south on Route 114 from the roundabout at School Street. Check-in 3:30-5:15 p.m.; kids’ fun run begins at 4:15 p.m.; 10k, 5:30 p.m.; 5k, 5:50 p.m. Benefits charities for the East End and Shelter Island communities. A runners’ festival follows the race.

5k race at 9 a.m., untimed 2-mile walk/fun run at 9:05 a.m., benefits families of childhood leukemia victims and other life-threatening diseases.

5k run/walk to support and raise awareness for the Long Island Crisis Center’s Pride for Youth, featuring post-race refreshments, held at Field 2.

5k to benefit children with cancer, one free beer for registered runners ages 21 and older, kids fun run starts at 9:15 a.m., donations of new toys or gift cards will be accepted.

1/4-mile children’s fun run at 4:15 p.m., 5k at 5 p.m., featuring post-race festival at Brady Park picnic area, benefits Massapequa High School track scholarships.

Race to benefit charities in honor of Navy SEAL Lt. Michael P. Murphy. Half marathon at 7 a.m., 1-mile fun run at 8:30 a.m., 4-mile run at 9 a.m.

Held at the Long Beach Boardwalk. 1k fun run 8 a.m., 4k at 8:30 a.m.

8k run and 3-mile run/walk to benefit the Southampton Rotary Scholarship Fund.

5k to benefit the families of fallen law enforcement officers.

5k to benefit the Never Stop Running Foundation, children’s fun run begins at 8:30 a.m., held at Field 2.

5k to benefit the Bellport Village Program Fund, fun run begins at 4:30 p.m.

5k run/walk, race benefits local charities, check-in 7-8:15 a.m., fun run at 8:15 a.m.

Race to benefit the members of the Bay Shore Engine Company No. 1. Fun run begins at 8:30 a.m.

5k run/walk to benefit the New York Cancer Foundation, featuring live entertainment and a glass of wine at the finish line.

5k run/walk around historic Sag Harbor, in honor of U.S. Marine Lance Cpl. Jordan C. Haerter, check-in at 7 a.m., opening ceremony at 8 a.m.

5k to support fallen and injured first responders, military heroes and their families.

5k for all U.S. Merchant Marine Academy midshipmen, alumni, family, friends, faculty and outsiders.

5k to benefit St. Jude Children’s Research Hospital, fun run begins at 8 a.m.

5k to benefit pre-hospital emergency care and transportation for residents in the Commack area. Fun run at 8:30 a.m.

Children’s fun run at 8:45 a.m., 4-mile run at 9:30 a.m.; five age groups from 10 and younger to 80-plus, check-in at Sayville Running Company on 35 Overton St.

5k to raise awareness and funds for depression research.

3.5-mile run/walk for teams from local companies, benefits local charities. Check-in 2-6:15 p.m., festivities at 5 p.m., race begins at 7 p.m.

5k fun run to benefit Alzheimer’s charities, featuring post-race ice cream.

4-mile run/walk ends at Bethel Hobbs Community Farm, fun run begins at 8:30 a.m.

5k to benefit breast health care and empower people affected by cancer. Fun run at 8:30 a.m.

5k to benefit the Islip Terrace Fire Department, fun run begins at 8:20 a.m.

Kids’ fun run starts at 8:30 a.m., women’s 1-mile starts at 9 a.m., men’s 1-mile starts at 9:30 a.m., featuring post-race refreshments, buffet lunch, raffle, silent auction and live entertainment, donations will be accepted.

5-mile race on the boardwalk, check-in begins at 6:30 a.m. Open to all ages.

5k and 10k to benefit Springs Fire Departments Academic Scholarships Program and Old Montauk Athletic Club’s (OMAC) Athletic Grants Program.

5k run/walk to benefit the Hauppauge Fire Department, kids fun run at 8:30 a.m., featuring live music, food and refreshments.

5k to benefit orphaned children in Meru, Kenya.

5k run for literacy; check-in 7:30-8:30 a.m., shotgun start at 9 a.m. Proceeds support the Community Family Literacy Project.

Benefits Alzheimer’s care, support and research, check-in begins at 9 a.m., opening ceremony at 10 a.m., donations will be accepted.

5k in memory of Deborah Rubano Stehlik, benefits scholarships.

5k to benefit Nassau Suffolk Services for Autism, held at Field 2.

5k and 10k run/walk to honor the memory of Hampton Bays and Lions Club icon Chet Sinclair. Check-in at Hampton Bays Middle School, 7-8:30 a.m.; racers will be bused to the starting area at Edward J. Warner Sr. Old Ponquogue Bridge Marine Park.

5k starts at 8:30 a.m., 1-mile family walk starts at 9 a.m., featuring post-race activity fair, benefits the Girl Scouts of Nassau County.

elitefeats.com, 516-531-3323.

Family walk/run to support ELIH Behavioral Health Services, check-in begins at 8:15 a.m., kids half-mile fun run starts at 8:30 a.m.

5k run/walk through the streets of Wantagh, 1k kids fun run starts at 8:30 a.m.

Long Island’s largest running race, 10k and 2k fun run, benefits the Special Olympics, VA Hospital and the local food pantry. Must register in advance as space is limited.

5k to raise awareness of domestic violence, support survivors and prevent future tragedies.

5k to support Long Island Cares’ Baxter’s Pet Pantry, check-in starts at 8 a.m., featuring vendors, pups, raffles and giveaways, bring a nonperishable pet food item.

5k to benefit DIPG awareness and research, kids fun run begins at 8:45 a.m.

13.1-mile half marathon and 10k and 5k run/walk.

5k run/walk to raise funds for service and guide dogs.

Kids fun run starts at 9:30 a.m., 5k starts at 10 a.m., benefits the Child Care Council of Nassau.

Benefits Alzheimer’s care, support and research, check-in begins at 9 a.m., opening ceremony will be held at 9:30 a.m., donations will be accepted.

1.75-mile loop, honors individuals born in 1965, all ages welcome.

• elitefeats.com, 516-531-3323.