Itinerary Help - Highlands - All suggestions welcome

You don't say how you are planning to travel from Portree to somewhere to Edinburgh. I'll assume bus and/or train. You can take a bus from Portree to Inverness (2 1/2 hours), to Aviemore (4 1/2 hours), to Pitlochry (5 1/2 hours) or to Oban (almost 6 hours including a change).

Inverness itself is not very appealing in my opinion, but from there you can visit Loch Ness and the Culloden battlefield.

Aviemore isn't very appealing either, but from there you can explore Cairngorms National Park.

Oban is nice. There's not a lot to see there, but you can take a ferry to the islands of Mull, Iona, and Staffa, which makes for a very pleasant day. Or if you're not tired of hiking, you can also take a short boat ride to the Isle of Kerrera and walk to the southern end to see Gylen Castle.

Pitlochry is a pleasant town in Perthshire, which is a beautiful, very scenic area.

I hope that gives you a few options to consider.

Thank you for your reply. My apologies I wasn’t specific - I’ll have a car. You’ve definitely given me some options to explore.

I loved the Isle of Raasay, which is a tiny island about a 15 minute ferry ride from Skye (at Sconser). There aren't a lot of service places—the Raasay House, and the Raasay Distillery are the only two places for lodging and there is a little community general store that I fell in love with. But mostly people go there for the hiking and the solitude. It really is wonderful: https://raasay.com You can hike out to Calum's Road, which he built by himself as the council wouldn't allow funds for it. It took him 10 years.

You also might consider the Isles of Mull or Arran. Both are wonderful; Mull is one of my favorites and relatively easy to get to from Skye. Arran is a bit farther south, but closer to the mainland. it's frequently called Scotland in Miniature because it has all the scenic features of the country; such as gorgeous beaches, mountains, castles, ruins, distilleries, and much more.

At Oban you can also take the car ferry over to Lismore, which is a very good walking island, and also visit St Moluags Church- the quire of the former Cathedral (and Monastery), unlikely as that sounds.
Or drive up to Port Appin, and take the far more frequent foot ferry over. A lot of locals have a beat up car on the island, take the foot ferry over and have a good car on the mainland.
The pier house at Port Appin is also a very good seafood restaurant and hotel.

My favourite location in Scotland was the Isle of Raasay although I'm not your typical traveller.
Plenty of nice hiking
The hike up Duncaan leads to some very spectacular views.
Calum's Road is only about 3 clicks but is a delight and the history makes it a bit special.
It starts just past an old ruined castle.
I would reckon you could hire kayaks from Raasay House if that interests you.
Even the short ferry ride was cool with a pod of dolphins escorting us.
As Mardee says there aren't a lot of accommodation options. We slept in our van tucked away in a discreet spot in the forest. We were able to use the showers at Raasay House for a couple of quid.

Another favourite area was the Torridon region. It is an absolutely brilliant area. I hiked a fair chunk of Beinn Eighe which is one of the great Scottish mountains. The drive up over the Bealach na Ba road and down to Applecross is one of the most spectacular roads in Scotland. Torridon itself is pretty tiny (but bloody gorgeous) not sure of accommodation options other than a good little free campground (coin operated showers).
It might be a bit too far north for you though.