UNAUTH LNDG AFTER NON ADHERENCE TO ATC INSTRUCTION.

Narrative

I WAS RECEIVING TA'S AND VECTORS TO FELTS FIELD FROM SPOKANE APCH. BEING UNFAMILIAR WITH THE AREA; I ASKED ABOUT THE TFC PATTERN AT FELTS AND WAS TOLD TO EXPECT R TFC FOR RWY 21R AT 3500 FT (1500 FT AGL) BECAUSE OF A BLUFF NEAR THE ARPT. APCH TOLD ME TO CONTACT TWR AND GIVE MY POS. I DID AND GAVE THEM LONG R DOWNWIND FOR THE R. TWR SAID TO RPT DOWNWIND. AS I NEARED THE ARPT; I SAW THAT THE BLUFF WAS QUITE CLOSE AND NEARLY AS HIGH AS THE PATTERN ALT. THERE WERE ALSO TWRS ON TOP. I WAS CONCERNED BECAUSE THE HT AND CLOSENESS OF THE HILL MADE MY DOWNWIND TOO HIGH AND CLOSE IN FOR A GOOD APCH. WHILE I WAS SORTING THROUGH THIS; I FAILED TO RPT DOWNWIND. AS I TURNED BASE AND FINAL; I CONCENTRATED ON MAINTAINING CTL AND GETTING DOWN. I OVERSHOT THE FINAL (EXTENDED RWY CTRLINE) AND TURNED BACK TO IT. I WAS STILL A LITTLE HIGH AND LANDED A BIT LONG (BUT UNEVENTFULLY). AS I ROLLED OUT; THE TWR TOLD ME I HAD FAILED TO RPT DOWNWIND AND HAD NOT BEEN CLRED TO LAND. HE WAS RIGHT. THE DISTRS OF THE NONSTANDARD PATTERN HAD PREOCCUPIED MY THOUGHTS AND CAUSED ME TO FAIL TO RPT AND FAIL TO NOTICE THE LACK OF LNDG CLRNC.