CONCORD -- He was the gregarious kid on the block, neighbors say, who others were drawn to and whom adults admired for his politeness. If he wasn't baby-sitting or watching his neighbor's pets, he was on his skateboard, his preferred mode of transportation.

On Friday afternoon, Scott Hickerson took his final ride after being struck by an SUV on Monument Boulevard around the corner from the street he grew up on. Hickerson, 21, died of his injuries at John Muir Medical Center in Walnut Creek later that night.

"Unfathomable," family friend Terry McCormick said Sunday, standing outside the Hickerson home on Peach Place. "Everybody just talks about how positive he was, how much life he had in him and how everyone was drawn to him."

Authorities have not yet released his name, but family and friends identified him Sunday.

Several bouquets of flowers have been taped to a telephone pole at the site of the collision. A memorial page created on Facebook said Hickerson "will truly be missed and remembered for his loving, caring compassion toward others, including his pets."

"With the holiday season in full gear, his family is left to grieve in this difficult time," one post read. "Let us remember Scott for all the things we loved him dearly for."

The 2009 graduate of Ygnacio Valley High School, who was taking classes at Diablo Valley College, was riding his skateboard in the crosswalk at the intersection of Monument Boulevard and Erickson Road around 4:30 p.m.

A 21-year-old Clayton woman, who has not been identified, was driving east on Monument Boulevard and struck Hickerson.

The color of the traffic light at the time of the collision, and whether alcohol or drugs were a factor is still under investigation. No arrests have been made.

"He was just minding his own business," said neighbor Eric Samuels. "We all have young kids. It makes you want to hug your kids."

Family members plan to open a donation fund in his name at the Wells Fargo Bank branch at Oak Grove Road and Treat Boulevard.

Hickerson is survived by his parents, Alan and Kelly, and younger brother Bradley.

Check back for updates to this story.

David DeBolt covers Concord and Clayton. Contact him at 925-943-8048. Follow him at Twitter.com/daviddebolt.