Walker, 40, lost his life when a Porsche he was a passenger in crashed into a pole in Valencia, California on November 30 last year.
Hundreds of fans ignored heavy rain to gather at the site and leave flowers and photos of their hero, reported TMZ online.
Walker's 'Fast & Furious' co-stars Michelle Rodriguez and Tyrese Gibson and members of his family were among those to offer up tributes through social media and news outlets, including Vin Diesel, who posted a touching photo of his daughter, Hania Riley, sitting on Walker's lap on the set of one of the hit films.
"He was an important part of my transition into fatherhood... That healthy family member, with the most positive outlook on life...
"A year ago today... A year of mourning... And his absence still leaves me speechless. We miss you Pablo...