Trainer Peter Casey has no doubt three miles is well within Flemenstar's range following his superb performance in the John Durkan Memorial Chase at Punchestown on Sunday.
The seven-year-old appeared to face his toughest task to date in tackling the previously unbeaten chaser Sir Des Champs, but he produced a foot-perfect round of jumping under Andrew Lynch to beat his fellow Cheltenham Gold Cup hope with plenty to spare.
Casey said: "There's not a bother on him this morning. He didn't have that hard a race really. I was a bit worried last week as he seemed very quiet, and he was the same at the races yesterday, but maybe he's just growing up."
The John Durkan was over two and a half miles and Casey is now looking forward to seeing his pride and joy test his powers over three miles for the first time under Rules in the Lexus Chase at Leopardstown on December 28.
The long-term target is Gold Cup, where his stamina will be tested even more severely over the extended three and a quarter miles of Prestbury Park.
"We have another big day coming up at Christmas. That will be his first run over three miles and it will tell us a lot more," said the trainer.
"I don't think he'll have any trouble getting the trip there and as Mick Fitzgerald (former jockey) said, only time will tell how he gets on over the last couple of fences in the Gold Cup. Let's just hope we get there.
"I don't think he was fully ready for yesterday and I think he can improve between now and Christmas, but then he'll probably need to. We'll get his next race out of the way before we look any further. The good thing about him is the ground doesn't make any difference.
"I never thought I'd have a horse like this and you have to give credit to the owner, as he could have sold him 10 times in the summer. If he'd sold him he wouldn't still be with me, but he always said he wasn't going to sell and I'm very happy he didn't!"
Paddy Power have installed Flemenstar as the 2-1 favourite for the Lexus, with Hennessy Gold Cup winner Bobs Worth quoted at 9-4 with a run. They then go 100-30 Sir Des Champs, 9-2 Tidal Bay, 6-1 Sizing Europe (with a run), 7-1 First Lieutenant, Hidden Cyclone, 10-1 Quel Esprit, 12-1 bar.
22 May 2015Gleneagles tees off at Curragh
Stars dazzles at Goodwood
Dettori receives golden ticket
Paris in Sandown shake-up
Tudhope suffers Haydock blow
Gatsby in great form for Gold run
O'Brien banking on Found progress
Ivawood targets Guineas revenge
Sole seeking home success
Brooch aiming to sparkle again
Dods hoping Angel can soar
Remote makes Festival return
Force back for Temple test
Cumani hangs fire as Dubai dazzles
Dods hoping for Angel delight
Epicuris team seek dispensation
Treve buzzing for Corrida comeback
No going concerns for Gatsby
Gleneagles spearheads Guineas field
Power to stay in Ireland
Muthmir earmarked for Haydock date
21 May 2015Ground concerns for Pretend
Ball back on duty at Worcester
Ground key to Boy Gold run
Fitz up against it for Galway
Hobbs to race in Godolphin blue
Haggas has plenty to Wonder about
Straight to Ascot for Rizeena
Curragh all set for big weekend
Byron in Greenlands hunt
Sandown or Epsom options for Spring
O'Brien looks to Tapestry
Europe the 'horse of a lifetime'
Legatissimo in Oaks reckoning
20 May 2015Top fillies given Irish Derby entry
Girl could spark Ascot dreams
Coolmore acquire Pharoah rights
Cirrus leads Longchamp septet
Time called on Europe career
Doyle set for Kazeem Gold run
RMG and ARC announce joint venture
Lyons planning dual Guineas raid
Albany aim for Spanish
Maarek team wait on ground
Birdcage takes flight at Dundalk
Gatsby tops Tattersalls entry
Great expectations in Needler
Karakontie likely to bypass Ascot
Devonshire added to Guineas field
Arod in Ascot frame
Elm team have high hopes
Varian retains Belardo faith
Ground to decide Power aim
19 May 2015Fanning targets swift return
Medrano camp turn to Hughes
Cossack named jumps champion
Toormore team get thinking caps on
Bear back on the move
Wind fired up for Temple test
Ballynagour makes French connection
Walker retains faith in Moon
Mimic in hat for Yeardley surge
Manhattan on menu for Protector
Pandora to swerve Oaks
Hannon duo primed for Guineas
Fabre rules out Lion Derby date
Weld respects Horn claims