 It is bridged by the B970 road at Tromie Bridge near Drumguish and flows a further 1.25 miles (2 km) northwest to meet the Spey near Lynchat.Loch an t-Seilich is fed by the Allt Loch an Duin which arises at Loch an Duin and passes through Loch Bhrodainn on its way north to Loch an t-Seilich, being joined on its right by the Allt Gharbh Ghaig before it does so.The name 'Tromie' is an anglicisation of the Gaelic word for 'elder tree'.