That’s a long way without a motor.
Sailplane pilot Gordon Boettger, of Minden, Nevada, broke his own Northern Hemisphere soaring record on May 31 by flying a total distance of 1,401 miles in his Kestrel sailplane in 13 hours, 17 minutes….He reached an altitude of 28,400 feet MSL and speeds as high as 165 mph. At times, his climb rate was 1,000 fpm.
Pretty impressive and it takes a lot more skill to ride thermals and mountain waves then straight and level in a powered airplane. It’s also sufficiently long that I doubt anyone would want to break that record in the future.