die Rast
rest / break
A break for recovery that you take during a trip, a hike, or another strenuous activity.
Nach zwei Stunden Wanderung machten wir an einem Aussichtspunkt eine Rast.
After two hours of hiking, we took a rest at a viewpoint.

rest / break
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rest / break
A break for recovery that you take during a trip, a hike, or another strenuous activity.
Nach zwei Stunden Wanderung machten wir an einem Aussichtspunkt eine Rast.
After two hours of hiking, we took a rest at a viewpoint.

'Die Rast' (rest/break) belongs to the word family of the verb 'rasten' (to take a break). The word 'Raststätte' (a service area on the highway) is also derived from it.
Wir sollten bald rasten, um neue Energie zu tanken.
We should take a break soon to recharge our energy.
The most common and natural formulations are 'eine Rast machen' or 'eine Rast einlegen'. Both mean to take a break to recover.
Die Wandergruppe legte am Gipfel eine lange Rast ein.
The hiking group took a long rest at the summit.
The word 'Rast' (rest/break) is almost always used in the context of travel, hikes, bike tours, or other longer, strenuous activities.
Auf unserer langen Autofahrt nach Italien machten wir alle zwei Stunden eine Rast.
On our long car trip to Italy, we took a rest every two hours.
The expression 'ohne Rast und Ruh' is a fixed idiom. 'Ruh' is an old-fashioned form of 'Ruhe' (rest/peace). The whole phrase means 'continuously' or 'without a break'.
Die Helfer waren nach der Katastrophe ohne Rast und Ruh im Einsatz.
After the disaster, the helpers were working without rest.
quiet / calm
'die Ruhe' and 'die Rast' can both mean a break for recovery. 'Ruhe' is more general and fits many situations, for example after work or at home. 'Rast' is used especially when you are on the road or stop briefly after physical effort, such as during a hike or a trip. 'Ruhe' sounds more natural when talking about relaxation in general; 'Rast' fits more with a specific break along the way.

Während der Wanderung machen wir an einem See Rast.
During the hike, we take a rest by a lake.
Nach dem langen Tag braucht die Mitarbeiterin eine Stunde Ruhe.
After the long day, the employee needs an hour of rest.