Timberline Ridge doesn't untap during your untap step if it has a depletion counter on it. At the beginning of your upkeep, remove a depletion counter from Timberline Ridge. {T}: Add {R} or {G}. Put a depletion counter on Timberline Ridge.
NM-Mint - $1.10
Lightly Played - $1.00
Moderately Played - $0.90
Heavily Played - $0.80
Damaged - $0.60
NM-Mint Non English - $1.10
Lightly Played Non English - $1.00
Moderately Played Non English - $0.90
Heavily Played Non English - $0.80
Damaged Non English - $0.60