While not evergreen in all areas clovers such as white dutch and crimson are good groundcovers and good for the soil.

Is this an area that will see foot traffic?

No it won't see any foot traffic but I do have a couple dogs. I took some pics but I don't know how to upload from my phone. After looking at it again it's probably 150' or more and maybe 15' up the hill.

I'd try a mix of rye grass, white and crimson clover. Then add some native wildflowers like red sage, coneflowers, blackeyed susans, coreopsis, California poppies, phlox, and wine cups.

Some shrubs and small trees would also help. Witchazel, blueberries, serviceberry, redbuds, dogwoods and crabapples would look good there.

Camrye,
Wow. That's going to be expensive.
I had to landscape a hill smaller than that and it costs a fortune.
Just do it a little at a time, that way you will see what takes and what doesn't before spending too much.
Ornamental grasses that don't need alot of water, and daylillies are also easy growers for a hill. Little care and good for erosion.

Does not have to be expensive with some patience.
jcalhoun suggested a nice list.
Check with your local cooperative extension. Mine has an early spring, order in advance, coop plant sale. A bit late this year but they could help with easy and recommended local plants for your area. Natives are often less expensive.
They may put you in contact with a neighbor that will offer cuttings and help you get an area established. A plant exchange may be up-coming on the calendar, etc.

When i bought my property, i found all of the above. My first year i researched.
My first early spring i picked up my order of rooted 'twigs'. I had over a hundred native trees, shrubs, ground covers...service berry, pines, red twig dogwood, etc. (i did not spend much more than 50 bucks)

I had no idea what i was doing but gave them each a quick sliver of a hole.

Fast forward a few years and now i am giving back. I have a few hundred red twig
cuttings rooting, my rudbeckia took over so i'm potting up that to give away. Taking plugs of wild native thyme groundcover. (a neighbor did that for me years ago).
Common milkweed...i have about a 1/2 acre....seeds offered for free all over the place.

Take an early morning drive, when us gardeners are out fussing, and look for similar landscape that you like. Slow down, wave, and compliment their landscape...haha.
They just might have a minute to share some information, or not. : )
I get that all the time, but they usually think i'm the landscaper and want to hire me.
(i'm always so filthy and dirt covered, lol)

-I still have a big bag of milkweed seed pods i could send, free. I don't even ask for shipping costs. Check with your extension service first to see if it is ok in your area.

Great story.