Beinn Mheadhoin via the Shelter Stone

Start between the mountain base station and café building. Take the bike-park path to the right of the garden, keep left at the junctions and follow the path left of the mountain-bike routes to the main track above the half-way station. Turn uphill on the west side of Coire Cas, then take the constructed path to Fiacaill a' Choire Chais. The broken tor marks the ridge. A Cairn Gorm summit diversion adds a separate climb and isn't part of this route.

From the ridge, continue into Coire Raibert. The path drops very steeply and rockily beside a cascading stream; Beinn Mheadhoin's tors appear across the loch. Cross the stream lower down and take the path on the far bank, descending toward the head of Loch Avon. The lake lies below high cliffs, with several small beaches at its head. This is the wildest-feeling stretch of the route, but the long drop into the basin has to be climbed again on the way back.

Near the loch's head, a narrow path crosses the inflow stream. It can be difficult or even impossible to cross when the water is high, so don't force it. Beyond, the path climbs toward Shelter Stone Crag before bending back toward Allt nan Stacan Dubha. Take the short side trip to Clach Dion, the huge fallen boulder that gives this route its name. Smaller stones hold it above a hollow large enough for several people to shelter in; it has served as a refuge for a long time. A cairn sits on top, but the hollow underneath is the memorable part.

Past the boulder, the path climbs steeply, eases near a stream and crosses wetter ground. Loch Etchachan comes into view to the right. Leave the path before it descends and make the initial pathless climb onto Beinn Mheadhoin's plateau. The first low tor, one of the Barns, looks out over Loch Avon; more granite tors lead across sandy, wind-blasted ground toward the summit. In mist, the tors help mark the line, but paths fade and navigation gets harder. The largest northeastern tor is the true summit: walk around to its far side for a short scramble to the top. You can skip that scramble, but you'll miss the highest point. At the first tor, include Loch Avon below the rocks in a photo; the lake gives the skyline a sense of scale.

Return over the plateau, past the Shelter Stone, around Loch Avon and back up Coire Raibert to the ridge and car park. The same stream crossings and steep ground come around again, with a substantial climb out of the basin. The published 8–9 hour estimate and 1,560 m of ascent reflect the full outing, not just the summit climb. Cairngorm Mountain car park is chargeable. A café building sits beside the start, and dogs are allowed under Scotland's responsible-access rules when kept under proper control.

The 19 km figure covers a return by the same route. It leaves Cairn Gorm's summit as an optional detour; the Saddle return and Ben Macdui extension are different routes.