( Tracks ( ( will ( ( ( ( ( ( lead ( ( up and ) down ) ) mountains ) , ) ( ( cross streams ) ( -LRB- ( ( often ( on logs ) ) -RRB- ) ) ) ) and ) ( continue ( for miles ) ) ) ) . ) )
(ROOT (S (NP (NNS Tracks)) (VP (MD will) (VP (VP (VB lead) (PRT (RP up) (CC and) (RP down)) (NP (NNS mountains))) (, ,) (VP (VB cross) (NP (NNS streams)) (PRN (-LRB- -LRB-) (PP (ADVP (RB often)) (IN on) (NP (NNP logs))) (-RRB- -RRB-))) (CC and) (VP (VB continue) (PP (IN for) (NP (NNS miles)))))) (. .)))
Tracks will lead up and down mountains, cross streams (often on logs) and continue for miles.
(ROOT (S (NP (NNS Streams)) (ADVP (RB often)) (VP (VBP start) (PP (IN in) (NP (NNS mountains)))) (. .)))