It can be hard to smile while running around and sweating in the high humidity, but it was harder to find someone without a smile Sunday morning at Caledonia Park in Dix Hills.

About 50 young athletes had a blast while sharpening their skills at the L.I.MITLESS Foundation’s third annual youth football clinic. Among the coaches were two of the organization’s founders, Newfield High products Elijah Riley and Denzel Williams.

“For how small in surface area Long Island is, it’s huge in population,” Riley said. “The goal is to get New York and Long Island on the same stage as Texas, Florida and Georgia. We’ve got the talent, we just don’t have the collective effort. So the goal is to just keep connecting with everybody and building community.”

Riley has spent five years as a defensive back in the NFL, including    last season with the Giants.  The young athletes had the benefit of learning from several NFL players during the three-hour clinic, including Allen Robinson II, who has played for five teams in the last 11 years.

At the end of the clinic, the athletes were split into teams and played three pickup games. George Diaz, 12, had a pick-6 with Riley running down the sideline alongside him.

“It went in slow-mo. I was like, no way I just did that,” said Diaz, a Centereach resident. “It’s really cool. It’s an honor and a lot of fun.”

The clinic was free of charge and was followed by a community barbecue and food drive benefiting Island Harvest.

“Not everybody can afford youth sports,” Riley said. “What we’re looking to do is create avenues for kids to get the necessary skills training to be quality athletes. But more importantly, we want the right people around so that they’re becoming better people.”

The youth clinic was the third and final event of the foundation’s first Legacy Week. Riley and Co. hosted a high school 7-on-7 tournament at Huntington High School on Friday. Newfield defeated Division in the championship game.

“It’s not rigged, I promise,” Riley said with a laugh.

More high school players returned to Huntington on Saturday for the foundation’s second annual skills combine and position-specific clinic.

“We didn’t have those things growing up,” Williams said. “We always knew we wanted to do it, but it’s baby steps. We wanted to get the youth camp going first and stack up on top of that from there.”

Riley and Williams plan to keep expanding the foundation’s reach and hope to start a flag football league for boys and girls.

“Deepen those community bonds and keep growing those roots. That’s what it’s all about,” Riley said. “These memories last a lifetime.”