Help with Coop Run on a slope

[412chickengirl]

Hi! Looking for some advice to improve our chicken run. Our coop is built inside the run at the top of the hill and the run goes approximately 30ish feet down on a decent slope. We've had lots of rain recently. Normally we would throw straw all over the ground to make it less muddy and easier to walk thru. Well that's not working and create a gross mess that's harder to work with because the chickens move the straw all down to the bottom of the hill and fence and it clogs up the gate. We tried the absorbant bedding pellets and while those work for one day of rain, after several rains, the run turns into this soft mud cake that you sink into. Is there anything else we can try to keep the coop dry and less muddy?