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.
Near Mint - $1.50
Near Mint Non-English - $1.50
Lightly Played - $1.30
Lightly Played Non-English - $1.30
Played - $1.10
Played Non-English - $1.10
Heavily Played - $0.90
Heavily Played Non-English - $0.90
Damaged - $0.80
Damaged Non-English - $0.80