I headed to the Todgha gorge from the area of Tinerhir. I'd recommend you follow my route. I travelled through beautiful palm groves and villages with ramshackle cabins: don't miss those sights during your holidays in Morocco. You'll eventually reach the rocky walls of the gorge.
I'd recommend going there in the early morning: the golden light of the first rays of the morning sun on the top of the gorge really is breathtaking. But do avoid visiting in the afternoon: the area gets dark quickly, and in winter, it can turn to freezing.
I went on a hike, heading first to the Little Gorge, where hikers gather, just 30 minutes by foot from the main gorge. If you opt for this, prepare for a full day of energetic walking. It is worth it: the viewpoint is ideal to admire the kasbahs and the gorges way below. When you leave the gorge, I suggest a visit to Tamtattouchte, a Berber village that typifies the type you find in the Atlas mountains.
Early in the morning, we took a taxi from Tinghir for the gorges. When the tourists arrived on mass by bus, we had already set off to walk in the red Todra Gorges. They are truly massive and narrow, illuminates by the sun at dawn, then dark and icy during the day.
Around midday, after a pleasant, albeit uphill, walk, we arrived at a splendid view point over the gorges (it's the place to have a picnic).
Then, we continued along blindly for a bit, in the direction of Tinghir, but via the palm groves. I hold on to an unforgettable memory of this unusual an improvised walk. The marriage between nature and the mountains really appealed to me. No tourist on the horizon. To absolutely be discovered on foot.