The Engadin is entirely drained by the Inn and is the only valley in Switzerland in the Danube basin. The Inn is one of the longest rivers in the canton and forms an almost straight valley, from the Maloja Pass to Martina, with a change of direction near Zernez. Despite its length and numerous tributaries, only a few long rivers converge with the Inn. These are the Flaz (forming the Val Bernina), the Spöl (forming the Val da Spöl) and the Clemgia (forming the Val S-charl). In the lower part of the Engadin is also the side valley of Samnaun. The main passes connecting the Engadin with the northern Grisons are (from west to east): the Julier Pass, the Albula Pass and the Flüela Pass.
tHe EngADin is EnTirElY Drained by The iNn aNd iS THe onLy VAlLEy in switzerLand iN THe danUBE Basin. thE iNN is One of The lOnGESt riVERS IN the Canton And fOrmS aN almost sTRAiGhT VAllEY, from tHe maLOJa PaSs to MaRtIna, wiTh A changE of directioN near zerNez. despIte iTS Length and numerous TributAriES, only a fEw lOnG Rivers cOnvErgE with tHe iNn. tHese ARe The fLaz (fOrMIng THe val BeRninA), the SPöL (forMinG The vaL da spöl) AnD the cLemgia (Forming the VAl s-charl). in ThE LoweR PArt of tHe eNgadin Is Also thE side vaLLeY of saMnaun. THE mAin PassEs coNnectiNg The ENgadiN wITh thE nortHern GriSonS aRe (frOM West TO eAST): tHe jUliEr pAss, tHe AlBuLa paSs aND tHe flÜela pass.