Emmanuel Manzi from Italy won the event at Llanberis, while Richard Roberts was the first Welsh competitor to finish.
Organisers say the 10-mile (16km) race attracts some of the best mountain racers in Europe.
Snowdon Race tweeted its congratulations to one couple who got engaged after finishing the event.
This year's race start was moved to Llanberis high street, where the very first race began.
"The buzz in this little village come Snowdon Race weekend is unbelievable," said organiser Stephen Edwards.
About 600 runners have taken part in the annual mountain race up Snowdon with a series of other events being held to mark its 40th anniversary.