The Aragats 4 Peaks is probably one of the best hikes/runs in all of Armenia, and puts you at the highest point in Armenia. On clear sunny days it is possible to even see mount Elbrus, Ararat, and Kazbegi from the North Summit. Even just hiking all 4 peaks in a day takes some strength an endurance as you are consistently at altitude (Above 3000m) the entire time. To get to the true North summit requires an easy but very committing ridge traverse so you should be comfortable on 4th/low5th class terrain. The route is generally done S, W, N, E, but all that matters is you tag every summit (including the true North.)
Weather can be unpredictable up there especially in summer, as storms will come in from the North and out of your view so be careful! S&R teams are nonexistent so if you get hurt, you're self-evacuating.
Start from the Kari lake and take paths through fields towards the South Summit, (3,887m) Then head North down to the South-West pass. Climb steep ground (2nd class) up to the West Summit (4,000m) then head back down to the South-West pass. Continue down into the caldera through the black stones and up to the North-East pass. Then go up steep switchbacks to the False North Summit (4,052m.) You must then navigate a 4th class (possible easy 5th class, however you want to grade it, just don't fall) to reach the true North summit (4,090m.) Reverse the traverse and blast back down to the North-East pass. Make your way up to the East summit (3,906m) with a short scramble along the way. After that back down to the North-East pass, back down into the caldera, back up to the South-West pass, the run around the South summit to avoid unnecessary elevation gain and back down to the lake.
https://www.strava.com/activities/5866578906.
Currently the unofficial record is 7 hours, but I think it can be run much faster, (I hiked it quickly in 9 hours with lots of downtime and snacking.)
https://www.armgeo.am/en/aragats/