Your Strength determines how far you can jump.

• Long Jump.
  • When you make a long jump, you cover a number of feet up to your Strength score if you move at least 5 10 feet on foot immediately before the jump. When you make a standing long jump, you can leap only half that distance. Either way, each foot you clear on the jump costs a foot of movement.
  • This rule assumes that the height of your jump doesn’t matter, such as a jump across a stream or chasm. At your GM’s option, you must succeed on a DC 10 Strength (Athletics) check to clear a low obstacle (no taller than a quarter of the jump’s distance), such as a hedge or low wall. Otherwise, you hit it.
  • When you land in difficult terrain, you must succeed on a DC 10 Dexterity (Acrobatics) check to land on your feet. Otherwise, you land prone.

• High Jump.
  • When you make a high jump, you leap into the air a number of feet equal to 3 + your Strength modifier if you move at least 5 10 feet on foot immediately before the jump. When you make a standing high jump, you can jump only half that distance. Either way, each foot you clear on the jump costs a foot of movement. In some circumstances, your GM might allow you to make a Strength (Athletics) check to jump higher than you normally can.
  • You can extend your arms half your height above yourself during the jump. Thus, you can reach above you a distance equal to the height of the jump plus 1½ times your height.

• Jumping further.
  • If your jump can’t quite make it as far as you need, your DM may allow you to make a Strength(Athletics) check to push your character just a little further. The base DC for this check is 10, but the DM may choose to raise it if you are trying to add more than 5 feet to your long jump or 2 feet to your high jump.