All nine Bath Rugby players training with England have been included in the 45-man squad who will continue their Rugby World Cup preparations in Denver.
After three weeks' training at Pennyhill Park, Dave Attwood, Sam Burgess, Kyle Eastmond, George Ford, Jonathan Joseph, Semesa Rokoduguni, Anthony Watson, Rob Webber, David Wilson and the rest of the squad will spend two weeks in Rugby Town USA, Glendale, Colorado.
Elliot Daly (Wasps), Maro Itoje (Saracens), Stephen Myler (Northampton Saints) and Ed Slater (Leicester Tigers) will return to their clubs and be on standby.
Nick Easter will remain at Harlequins for treatment on a sore back and will rejoin the squad at Pennyhill Park on Sunday, August 2 following their post-Denver break.
England Head Coach Stuart Lancaster said: "Elliot and Maro have fitted in and trained well and it's been great for them to be in this environment. They are both young players who have bright futures. They have made a great impression and I am sure other opportunities will come for both of them further down the line.
"Steve and Ed, likewise, have contributed greatly. Ed has done well to recover from his knee injury having missed the majority last season. However, there is a lot of competition in the second row.
"Steve, who is in another really competitive position, has only recently been able to take a full part in training having injured his knee towards the end of last season. But he is getting up to speed now and I am sure he would be ready to come back in should the opportunity arise.
"I have spoken to all the players to explain that things can change very quickly and they can come back in at any point.
"Nick will stay for treatment on his back rather than risk aggravating it further with travel and we look forward to him re-joining the squad in August when we will review the squad and also consider those who have been unable to begin the camp after suffering injuries at the end of last season.
"The players have worked very hard for the past three weeks and there is a really good feel about the group. Denver is the next stage in our training, a chance to develop further in a different environment."
England Denver training squad
Chris Ashton (Saracens)
Dave Attwood (Bath Rugby)
Brad Barritt (Saracens)
Kieran Brookes (Newcastle Falcons)
Mike Brown (Harlequins)
Luther Burrell (Northampton Saints)
Sam Burgess (Bath Rugby)
Danny Care (Harlequins)
Danny Cipriani (Sale Sharks)
Calum Clark (Northampton Saints)
Dan Cole (Leicester Tigers)
Alex Corbisiero (Northampton Saints)
Luke Cowan-Dickie (Exeter Chiefs)
Lee Dickson (Northampton Saints)
Kyle Eastmond (Bath Rugby)
Owen Farrell (Saracens)
George Ford (Bath Rugby)
Alex Goode (Saracens)
Jamie George (Saracens)
James Haskell (Wasps)
Jonathan Joseph (Bath Rugby)
Courtney Lawes (Northampton Saints)
Joe Launchbury (Wasps)
George Kruis (Saracens)
Matt Kvesic (Gloucester Rugby)
Joe Marler (Harlequins)
Jonny May (Gloucester Rugby)
Ben Morgan (Gloucester Rugby)
Matt Mullan (Wasps)
Jack Nowell (Exeter Chiefs)
Geoff Parling (Leicester Tigers)
Chris Robshaw (Harlequins)
Semesa Rokoduguni (Bath Rugby)
Henry Slade (Exeter Chiefs)
Billy Twelvetrees (Gloucester Rugby)
Mako Vunipola (Saracens)
Billy Vunipola (Saracens)
Anthony Watson (Bath Rugby)
Rob Webber (Bath Rugby)
Richard Wigglesworth (Saracens)
David Wilson (Bath Rugby)
Tom Wood (Northampton Saints)
Marland Yarde (Harlequins)
Ben Youngs (Leicester Tigers)
Tom Youngs (Leicester Tigers)
August 15, QBE International, Twickenham Stadium, England v France, 8pm
August 22, Stade de France, France v England, 9pm (local time)
September 5, QBE International, Twickenham Stadium, England v Ireland, 2.30pm
September 18, RWC 2015, Twickenham Stadium, England v Fiji, 8pm
September 26, RWC 2015, Twickenham Stadium, England v Wales, 8pm
October 3, RWC 2015, Twickenham Stadium, England v Australia, 8pm
October 10, RWC 2015, Manchester City Stadium, England v Uruguay, 8pm