You cover a number of feet up to your Strength score if you move at least 10ft on foot immediately before the jump.
When you make a standing long jump, you can leap only half that distance
May involve a DC 10 Strength (Athletics) check to clear a low obstacle (no taller than a quarter of the jump's distance). You hit the obstacle on a failed check.
May involve a DC 10 Dexterity (Acrobatics) check to land on your feet in difficult terrain. You land prone on a failed check.