Peter Facinelli as Erik Weihenmayer

Jack Knight as Erik (12-16 years)

Dawson Dunbar as Erik (3 years)

Sarah Manninen as Ellie

Bruce Campbell as Ed Weihenmayer

Kate Greenhouse as Ellen Weihenmayer

Robert Moloney as Sam

Saxon DeCocq as Jeff Evans

Aaron Poole as Chris Morris

Shaun Johnston as PV

Mingma Chiri Sherpa as Ang Pasang (credited as Mingma Sherpa)

Marty Antonini as Mike O'Donnell

Kurtis Sanheim as Mark

Sean Anthony Olsen as Eddi (credited as Sean Olsen)

Joseph Allan Sutherland as Mark (young) (credited as Joseph Sutherland)

Joel Smith as Eddie (young)

Steve Smith as Kip

Jonathan Love as Kevin Cherilla

Brooklynn Proulx as Emma (6 years) (credited as Brooklyn Proulx)

Taheer Nurani as Sikh Boy (Nanak)

Sarah Hyslop as Tiffany

Connor Robinson as Kid #1

Connor Schmidt as Brian

Talon Dunbar as David

Lori Ravensborg as Mrs. Mundy

Ron Carothers as Jerry (credited as Ronald Carothers)

James Dugan as Bob Allman

Gillian Carfra as Kim - PV's wife

Gerald Matthews as Dr. Brockhurst

David LeReaney as Carl

Tom Lim as Nick (credited as Tommy Lim)

Cassandra Bennett as Sacha

Chris Ippolito as Victor

Tarra Riley as Bar Girl

Aedan Tomney as Mitch

Stephen Strachan as Kaegan Reddy (credited as Steve Strachan)

Kate Newby as Math Teacher

Wally Houn as Monk

Carrie Colak as Neighbour

Larry Austin as Priest

Lindsay Burns as Principal

Khari Jones as Wrestling Coach

Brian Copping as Sherman Bull

Tom Carey as Brad Bull