Bone caves walk is good, if short. How long a walk you looking for? You don’t really need any climbing gear up there.
Just on from the bone caves are Conival and Ben More Assynt, the highest peaks in the region. A longer day out, and there is a narrow ridge connecting the two tops which is not for those afraid of heights!
Just past Inchnadamph towards Lochinver is Quinag, with an excellent path on it and a car park next to the road. No gear beyond boots and a jacket required.
Just beyond Lochinver is Inverkirkaig Falls, a really nice walk to a beautiful spot. Ace cafe at the bookshop too.
For a longer day out, Suilven (the most iconic mountain in Scotland IMO) is an easy climb, albeit with a long and pretty featureless walk in, but that’s part of the beauty of Assynt, how barren and desolate so much of it is.
Achmelvich beach – just outside Lochinver – is gorgeous, with plenty of walking nearby.
Going the other way from Inchnadamph towards Ullapool you can reach Stac Pollaidh, which gives great views of Suilven and the Summer Isles, and is an easy walk up.
If you go north from Inchnadamph to Kylesku, there’s good walking round there too, as well as some pretty special food at the hotel.
I love Assynt, can’t wait to go back.