Saturday's meeting at Uttoxeter and the fixture scheduled for Sedgefield on Sunday have both fallen victim to the cold weather.
Uttoxeter clerk of the course Charlie Moore reports the track to be unraceable due to frost and snow and admits the situation is hopeless.
He said: "We've had to let it go. We have still got two inches of snow on the track with a hard frost forecast. There is not sufficient warmth and moisture in the forecast before Saturday as the forecast rain will come too late. Even if it did come in time, we could then end up waterlogged."
Clerk of the course Phil Tuck was due to inspect the Sedgefield track at 2pm on Thursday but was able to make an earlier call as there is no prospect of sufficient improvement in conditions.
He said: "It's not improved at all and it's a hopeless case really. We are forecast minus 4C tonight and although it stayed above freezing last night, there is so much snow on the track it made no difference. We are forecast more snow on Friday and there is no chance of it improving."
Sunday's card at Fontwell is under threat, with officials planning a 10am inspection on Saturday due to waterlogging.
Clerk of the course Edward Arkell said: "We remain waterlogged in places. We are forecast an overcast, damp day and then a band of snow, and/or rain or sleet, probably a quite heavy one, moving in.
"We are then forecast snow again on Saturday evening so we will have a look on Saturday morning on the basis that if we are not fit to race then, we won't be fit to race on Sunday. We had three inches of snow on the track that melted quite quickly with another half an inch of rain on top.
"The track, like everywhere, has had a hard winter with the volume of rain."
26 May 2015Double sets welcome mark for Gask
Haggas on War footing for Ascot
Rain would boost Sand Ascot dream
Oaks trip to suit Legatissimo
Coronation up Dolniya's street
Karaktar on track for French Derby
Punters' Pal Set For Musselburgh
Ribbons may cut a dash to Curragh
Simenon bids for Henry II rule
Gosden duo at ease for Brigadier
Derby duo gives Gosden glee
Found remains in Derby hat
Park satisfies in Epsom spin
Angel of the north has Royal aim
Treve delights Head-Maarek
Epicuris heads to Epsom
Fire lit up for Redcar gold run
Park set for Epsom 'sighter'
Karpino oozes class in Cologne
Limato set for Haydock weekend run
Moviesta pleases in Curragh spin
Leisure date for Lucky
Prince to step up
Cirrus likely to bypass Epsom
Ascot option for Devonshire
25 May 2015Limato set for Haydock weekend run
French ace Chop in line for Ascot
Pretty target for Tamadhor
Prolific Robin in foal
Ramone delights Farrell
Moore set for Shamal ride
O'Brien still has Derby puzzle
Air Force has lift-off on debut
Guineas glory for Pleascach
More Curragh Gold for Kazeem
Curvy holds off Canaletto
Super Solow takes Longchamp prize
Varian pleased by Belardo effort
Dirty scope blamed for Byron run
Ascot test for Time
24 May 2015Full steam ahead for Mast return
Mustajeeb sprints to it
Pearl's a sprint jewel for Barron
Tate springs Listed surprise
First Ascot chance for Crisford
Glen best miler we've had - O'Brien
Exciting options for Simcock ace
Muta grabs Bowl with late charge
No decision on replacement - McCoy
Harrington bids for Guineas glory
23 May 2015Mustajeeb sprints to it
Big-race options for Corsican team
Gagarin in orbit for Gallinule
Tudhope back for Force mount
Luck be a Lady for Burke
Gleneagles tees off at Curragh
Stars dazzles at Goodwood
Dettori receives golden ticket
Tudhope suffers Haydock blow
Gatsby in great form for Gold run
O'Brien banking on Found progress
Sole seeking home success
Remote makes Festival return
Force back for Temple test