Updated 2021

Over the years there was talk of a High Atlas crossing in 100-km span between the MH12 Demnate backroad (above) and MH1 via Agoudal. The 4000-m ridge of the Mgoun massif separated them.
There are trekking trails which probably could be threaded together on a light bike, but now Moroccan road builders have completed what I’ve dubbed ‘MH19‘, a route usable in any vehicle as long as conditions allow. I heard about it too late to describe fully in the 2017 edition, although it is mapped on page 110 (below left).

I got to ride the route on a 250 just as the book was published in October 2017, and again about a month later southbound in a 4×4. Like many Morocco routes it’s a straightforward drive once you find the start points, doable without much of a description or GPS.
Northbound, all you need to know is:
1. Fork right, off the road at the top end of Alemdoun village for the old route through the gorge, or stay on the tarmac over the pass. Southbound, just east of Tabant turn right (south) over the ford for the easy 17-km climb to the Ait Imi pass.
2. Have a 200km fuel range.

Elevation profiles show the road climbing steeply from the south up to the Aït Hamad pass, but the gradient on the entire route is never extreme, and as long as the surface remains smooth, the route is doable in a regular car or a fully loaded big adv bike.
It took us 3 hours to ride the 80-km of piste from Alemdoun to Tabant, and about the same southbound in a 4×4.

At Amelgag we chose the gorge route (right) instead of the new climb over the pass, a great diversion (and the original route) which is still used by local Merc taxivans. Coming north, turn off right at the bend as you enter Amejgag village and wind your way north through the village to the gorge.

Wikiloc map and kml

‘MH19’ links the book’s two Jebel Sarhro west routes, MH14 and 15 which end near Kelaa, with routes MH16, 17 and 18 in the Aït Bouguemaze valley on the north slopes of the High Atlas.

The route passes Alemdoun (cafes, fuel at the shop if you ask). On the way you’ll pass many Rose Valley auberges in the villages. At the start of Alemdoun keep on the bypass west of the village for Amejgag. Here on as bend, the original piste splits right (north) for the Amejgag Gorge and the river to join up in the Ameskar valley in about 10km. Most local traffic uses this narrow route.

Otherwise, the new route takes you up over a 2350-m ‘Amejgag Pass‘ (KM50) before dropping down to Ameskar and joining the gorge route (KM56). Now the steep climb begins to the 3042-metre Tizi n’Ait Hamad (~KM65). From the top of this pass (left; telecom tower; bloke in a hut) Jebel Mgoun summit (4071m; second only to Toubkal) is a 16km walk to the west. This was the rougher part of the crossing, but still smooth enough to be doable in a 2WD or a heavy bike.

You descend from the Ait Hamad (above), climb an intermediate pass then descend into the valley of the Mgoun river, bypassing some remote villages of El Mrabitine. This descent is on a broader, metalled road, which should be sealed by now.  You cross the Mgoun stream (KM83) and climb less steeply to the Tizi n’Aït Imi (2898m; ~KM98). At the top Aït Bouguemaze valley lies 20km below.
Busy Tabant village (KM117) has shops and basic bap cafes before you join MH18 (if heading west). As the whole area is popular with trekkers, there are several auberges hereabouts.

Fuel
There is a small Total just west of the Rose roundabout in Kella; the point where you turn north off the N10. At the Aït Bouguemaze end, the nearest fuel is either Azilal, 79km to the north via MH17 – a fabulous drop from the pine forests. Or stay on MH18 west to Demnate; 83km – about 90 mins of near-constant bends.
Total fuel-to-fuel distance from Kelaa to either is around 200km, but there is drum fuel at the shop at the top end of Alemdoun.