The chapel at Cathedral Catholic High School was packed with hundreds of people Tuesday night praying and thinking of the victims of Monday night's crash that killed two recent graduates.
"You could feel the sadness from everybody, it just breaks your heart,"said Erin Winters. The La Costa High School student didn't know the victims but felt compelled to come to the service.
"It really hits home, really makes you stop and think about life and how fragile that it is,"Winters said.
The Expedition swerved into oncoming traffic on Highway 395 near Bishop and slammed into a van carrying 13 people.
Post and Nield were killed and Thomas suffered severe burns to most of his body. Derek Dellis and local trainer John Adams were also in the Expedition and severely burned.
Post and Nield were remembered by friends as smart, fun and loving students who were members of Cathedral Catholic High's cross country and track teams.
"It's such a bad tragedy, I just couldn't believe it," said Nicole Barabi who was friends with Post.
Another friend told NBCSanDiego that the group had gone to Mammoth for high altitude training and lessons in coaching before the crash.
CHP investigators are still trying to determine exactly why the Expedition swerved into oncoming traffic. Neither drugs or alcohol are believed to have played a role in the accident.
The high school is bringing in counselors Wednesday and Thursday to discuss the accident with students.