Is spring or autumn better for an Atlas trek?

These are the two prime trekking windows in the High Atlas, and I genuinely book both — the right one depends on whether you're optimising for beauty or for predictability. Spring, roughly April into May, is the photographer's season. The lower valleys are emerald green, the wildflowers are out, the rivers and waterfalls run full with snowmelt, and the high summits — including Toubkal — still wear a cap of snow that makes the views spectacular. It's the Atlas at its most lush and dramatic, and the air is fresh and clear after winter.

Autumn, September into October, is the reliability season. The summer heat has broken, the snow hasn't yet returned to block the high passes, the trails are dry and firm, and the weather settles into long stretches of stable, sunny days that make planning a multi-day trek far less of a gamble. The landscape is drier and browner than spring — you trade the green for golden — but if your priority is simply walking in comfortable, predictable conditions with the lowest chance of a washout, autumn is the safer bet.

Now the honest caveats, because each season has a sting. Spring's snowmelt that fills those gorgeous rivers also means muddy trails, swollen stream crossings that can be tricky, and lingering snow on the high routes that may need an ice axe, crampons, and a guide who knows the avalanche picture if you're summiting Toubkal early in the season. Autumn's risk is the opposite — by late October the first snows can arrive without much warning and the days shorten quickly, so a late-autumn high trek can get caught by an early winter front. Neither is foolproof.

My practical steer: if you want the most beautiful Atlas and you're a confident walker comfortable with some snow and stream-crossings up high, go spring — May especially, when the worst of the melt has eased but the green is still vivid. If you want the most dependable conditions for your first multi-day trek, or you're bringing less-experienced walkers, go autumn — late September is my sweet spot, warm and stable with clear trails. Avoid high summer (too hot at low altitude) and deep winter (real mountaineering conditions) unless that's specifically what you're after, and either way, take a local mountain guide for anything above the valley walks.