Climb Speed
Source Player Core pg. 412
A climb Speed allows you to move up or down inclines and vertical surfaces. Most creatures need to succeed at Athletics checks to Climb, but if you have a climb Speed, you automatically succeed and move up to your climb Speed instead of the listed distance.
You might still have to attempt Athletics checks to Climb in hazardous conditions, to Climb extremely difficult surfaces, or to cross horizontal planes such as ceilings. You can also choose to roll an Athletics check to Climb rather than accept an automatic success in hopes of getting a critical success. Your climb Speed grants you a +4 circumstance bonus to Athletics checks to Climb.
If you have a climb Speed, you're not off-guard while you're climbing.
You might still have to attempt Athletics checks to Climb in hazardous conditions, to Climb extremely difficult surfaces, or to cross horizontal planes such as ceilings. You can also choose to roll an Athletics check to Climb rather than accept an automatic success in hopes of getting a critical success. Your climb Speed grants you a +4 circumstance bonus to Athletics checks to Climb.
If you have a climb Speed, you're not off-guard while you're climbing.