▁travers ed ▁by ▁the ▁ ▁Meta com et ▁Tra il . ▁ ▁Geography ▁R ough ly ▁ ▁in ▁diameter , ▁Brad ley ▁Mountain ▁r ises ▁ste ep ly ▁ ▁above ▁the ▁Qu inn ip iac ▁River ▁valley ▁to ▁the ▁west . ▁The ▁mountain ▁consists ▁of ▁an ▁upper ▁rid g eline ▁ ▁with ▁several ▁summ its ▁and ▁a ▁lower ▁ ▁high ▁bl uff - line . ▁The ▁Meta com et ▁R idge ▁continues ▁north ▁from ▁Brad ley ▁Mountain ▁as ▁the ▁rid g eline ▁of ▁P inn acle ▁Rock ▁and ▁south ▁as ▁R ag ged ▁Mountain . ▁P lain ville ▁Res er voir ▁( also ▁called ▁C res cent ▁Lake ) ▁occup ies ▁a ▁bow l - sh aped ▁valley ▁on ▁the ▁western ▁side ▁of ▁the ▁mountain , ▁and ▁Sh utt le ▁M ead ow ▁Res er voir ▁stands ▁between ▁Brad ley ▁Mountain ▁and ▁R ag ged ▁Mountain ▁to ▁the ▁south . ▁The ▁lower ▁bl uff - line ▁is ▁occupied ▁by ▁sub urban ▁development . ▁A ▁ ▁diameter ▁tra pro ck ▁quar ry , ▁owned ▁by ▁T il con , ▁has ▁ob liter ated ▁the ▁n ortheast ▁side ▁of ▁Brad ley ▁Mountain ▁below ▁the ▁sum mit . ▁ ▁The ▁Qu inn ip iac ▁River , ▁not ▁much ▁more ▁than ▁a ▁bro ok ▁this ▁far ▁north , ▁passes ▁west ▁through ▁the ▁gap ▁between ▁Brad ley ▁Mountain ▁and ▁P inn acle ▁Rock , ▁forming ▁the ▁north ▁and ▁west ▁and ▁d rain age ▁of ▁the ▁mountain , ▁before ▁flow ing ▁into ▁Long ▁Island ▁Sound . ▁The ▁east ▁and