CAPT OF CPR LTT ACFT DEV FROM ASSIGNED HDG TO AVOID TSTM ACTIVITY.

Narrative

DENVER CTR CLRED US FOR APCH TO EAGLE ARPT FROM OVER RLG VOR. A SMALL STORM WAS OVER RLG SO I LED MY 90 DEG PLUS TURN A FEW MI. AFTER TURNING ONTO OUTBOUND LEG A LARGE TSTM WAS ON FINAL APCH AND ON THE INITIAL LEG. I REQUESTED HOLDING AND WAS TOLD TO RETURN TO RLG AND HOLD. NO RADIAL; NO EFC. CTR WAS VERY BUSY. AFTER TURNING TOWARD RLG THE TSTM WAS BUILDING RAPIDLY AND HAD STARTED TO CONTOUR ON OUR RADIO. TELLING CTR WE WOULD NOT BE ABLE TO HOLD WE WERE GIVEN A HDG S. AFTER SEVERAL TURNS TO MISS WX AND FOR CTR WE WERE TOLD TO HOLD OR FLY E OF RLG. SINCE CTR KNEW A TSTM WAS OVER RLG AND CTR GAVE NO RADIAL. I WAS FLYING BTWN STORMS BTWN THE 030 DEG AND 150 DEG RADIAL. ON A HDG OF 120 DEGS CTR TOLD US TO IMMEDIATELY TURN L TO 340 DEGS AND DSND TO 18000. NO COMMENT WAS MADE IF SEPARATION STANDARDS WERE LOST. MORE STANDARD AND SPECIFIC INSTRUCTIONS COULD HAVE PREVENTED US FROM POSSIBLE BEING IN CONFLICT WITH OTHER TFC. HVY WORKLOAD FOR CTLR IN MOUNTAIN REGION AND LACK OF RADAR CAN LEAD TO ACFT SEPARATION BEING LOST. ONE WAY INTO AND OUT OF SOME ARPTS; TSTMS; AND HIGH MOUNTAINS PREVENT WHAT ARE NORMAL OPTIONS ON FLAT LAND FROM BEING USED. SUPPLEMENTAL INFO FROM ACN 218486. THE FREQ BECAME VERY CONGESTED AT THAT POINT. AND WE WERE NOT ABLE TO COMMUNICATE THE FACT THAT A HDG OF 090 DEGS WOULD PUT US INTO A TSTM. WE TURNED TO A HDG OF 12 DEGS TO AVOID THE WX. THE FREQ REMAINED CONGESTED UNTIL WHAT SOUNDED LIKE AN ATC SUPVR TOOK OVER AND ORDERED AN IMMEDIATE DSCNT TO FL180 AND A TURN BACK TOWARD THE N. AGAIN THIS HDG TURNED US BACK INTO WX. EVERY FOLLOWING HDG CHANGE ATC REQUESTED TURNED US INTO WX. AT THIS TIME THE TSTM N AND E OF THE ARPT HAD MOVED E. A SAFE DISTANCE TO ALLOW AN APCH FROM THE W SIDE OF THE ARPT. WE REQUESTED A RTE S AND THEN W AROUND THE WX IN ORDER TO APCH VEIL FROM THE W. ESSENTIALLY TOWARD GRAND JUNCTION AND THEN BACK. INSTEAD ATC TURNED US N. TO GAR THE WX TO THE N WE WOULD HAVE REQUIRED 100 NM N THEN A TURN W; THEN S AGAIN. ABOUT 200 NM ADDITIONAL. FUEL WAS NOT SUFFICIENT FOR THIS. DIVERTED TO JEFCO ARPT. NEVER REFUELED AND PROCEED TO VEIL; ATC HAS TO REALIZE THAT WE CANNOT FLY INTO CONTOURING TSTMS. THEY WERE TOTALLY INFLEXIBLE.