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."
30 September 2014Power primed to storm Abbaye
Creepy excels on chasing bow
Al Kazeem given Arc go-ahead
Buick makes Ivanhowe Arc link
Power heads Abbaye market
Martin keen on Clonard
Cirrus heads Longchamp billing
Elite aim for Irving
Ribbons run hinges on Paris ground
No fitness worries for Lemaire
Quick on course for Ces date
Beaux plans undecided
Foret-bound Byron enjoys workout
Perfect fencing start for Minstrel
Ted takes Roscommon honours
Rain fillip for Treve Arc challenge
Speed not an issue to River camp
Signal on course to Wow in Paris
Ivawood heads Millions field
Top fillies star in Chariot race
Point primed for Abbaye assignment
29 September 2014Logic ruled out for the season
Ansgar in Foret frame
Kalann team consider Champions bid
Peslier and Mosse hunt Arc mounts
O'Brien trio set for Longchamp
High hopes for Elliott team
Berry takes the rails route
River cruises to Beresford glory
Qualify swoops for O'Brien team
Minstrel ready for chasing bow
Tiggy Abbaye run not set in stone
Angel camp ponder Darley raid
Pineau ripe for new season
Mubtaghaa suited by joy of six
Fiesolana fired up for Foret
28 September 2014Keighley holds Court for Cheltenham
Mart makes Newland's day
Spin does the trick at Ripon
Angel heaven-sent for Tregoning
Tiggy takes Cheveley gold
Lodge proves a stroll in Park
Rosalie blossoms for hat-trick
Naylor seeking Paris prize
Integral on course for Chariot
Dettori anticipating 'vintage' Arc
27 September 2014Fox on prowl for Rasen riches
Educate out to teach lesson
Euro raiders land in Australia
Tributes pour in for Toby Balding
Bans made after McCoy incident
Ground key to Muthmir run
Leather in Ascot picture
Custom proves cut above
Lucida rocks in Rockfel
Etaab delivers in Haggas double
Cosgrave cleared to continue riding
Cumani sees positives in Velox