What is the furthest and highest anybody has flown in a glider?

Here is the official record of gliding achievements taken from the British Gliding Association.

Gain of Height

10545m

C Rollings & B Hicks

UK

DG500 22

08/10/95

Absolute Altitude

11500m

H Goodhart

USA

SGS 1-23

12/05/55

Straight Distance

949.7km

K Karel

Australia

LS3

20/01/80

Goal Distance

892.1km

R May & P Rackham

USA

ASH25

06/07/95

O&R Distance

1127.68km

M Sands

USA

Nimbus 3

07/05/85

Triangle Distance

1362.68km

R Robertson

USA

Ventus A

02/05/86

Free Distance

1362.68km

R Robinson

USA

Ventus A

02/05/86

Free O&R Distance

1127.68km

M Sands

USA

Nimbus 3

07/05/85

100km Triangle

166.38km/h

B Cooper

Australia

LS6B

04/01/91

300km Triangle

157.96km/h

B Spreckley

S Africa

Nimbus 3

10/12/97

500km Triangle

151.37km/h

P Hawkins

Australia

Nimbus 4T

04/01/99

750km Triangle

136.92km/h

P Kurstjens

Australia

Nimbus 4T

02/12/99

1000km Triangle

122.42km/h

P Hawkins

Australia

Nimbus 4T

25/12/98

1250km Triangle

109.01km/h

R L Robertson

USA

Ventus A

02/05/86

300km O/R

159.20km/h

B Spreckley

S Africa

Nimbus 3

12/12/97

500km O/R

167.59km/h

B Spreckley

S Africa

ASW22blc

21/11/99

750km O/R

130.16km/h

P Hawkins

Australia

Nimbus 4T

06/01/99

1000km O/R

116.27km/h

P Hawkins

Australia

Nimbus 4T

11/12/98