PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (7 handed) from (Format: Bet The Pot)

Button (t1460)
SB (t2050)
BB (t3035)
UTG (t1885)
MP1 (t3515)
Hero (t1705)
CO (t1350)

Preflop: Hero is MP2 with , .
UTG calls t100, 1 fold, Hero raises to t400, 4 folds, UTG calls t300.

Flop: (t950) , , (2 players)
UTG checks, Hero bets t500, UTG calls t500.

Turn: (t1950) (2 players)
UTG checks, Hero checks.

River: (t1950) (2 players)
UTG bets t985 (All-In), Hero calls t805 (All-In).

Final Pot: t3740

Would it have been too late to let go on the river?

Another set I just couldnt let go:

PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (8 handed) from (Format: Bet The Pot)

MP2 (t3983)
CO (t1910)
Button (t1980)
SB (t1640)
BB (t1612)
UTG (t1060)
UTG+1 (t1440)
Hero (t1375)

Preflop: Hero is MP1 with , .
UTG calls t50, 1 fold, Hero calls t50, 2 folds, Button calls t50, 1 fold, BB checks.

Flop: (t225) , , (4 players)
BB checks, UTG checks, Hero checks, Button bets t150, BB folds, UTG calls t150, Hero raises to t300, Button calls t150, UTG calls t150.

Turn: (t1125) (3 players)
UTG checks, Hero bets t400, Button raises to t800, UTG folds, Hero raises to t1025, Button calls t225.

River: (t3175) (2 players)

Final Pot: t3175

Needless to say I lost both of these

Raise more on the Flop in Hand #2, otherwise it's fine

Bet the turn in hand #1, as played.. folding the river is probably best, he'll have the A very often here imo.