Regent, Royal and Carlton Terrace Gardens lasted until 2011, when it was felled due to disease. The following tree species were recorded in the gardens at the end of the 20th century: ash ("Fraxinus excelsior"), beech, black poplar ("Populus nigra"), cherry ("Prunus avium"), common lime ("Tilia × europaea"), English elm ("Ulmus minor" 'Atinia'), hawthorn ("Crataegus monogyna"), holly, horse chestnut ("Aesculus hippocastanum"), laburnum ("Laburnum anagyroides"), Norway maple ("Acer platanoides"), oak ("Quercus robur"), rowan ("Sorbus aucuparia"), silver birch ("Betula pendula"), small leafed lime ("Tilia cordata"), sweet chestnut ("Castanea sativa"), sycamore ("Acer pseudoplatanus"), tulip tree ("Liriodendron tulipifera"), whitebeam ("Sorbus aria"), white poplar ("Populus alba"), and wych elm ("Ulmus glabra").
Mountain Ash, Rhondda Cynon Taf secondary school is the hospital Ysbyty Cwm Cynon which opened in 2012 replacing the old Mountain Ash General Hospital. Local primary schools include Our Lady's R.C Primary School, Caegarw Primary School (Ysgol Gynradd Caegarw), Glenboi Primary School (Ysgol Gynradd Glen-boi), Darranlas Primary School (Ysgol Gynradd Darren-las), Miskin Primary School (Ysgol Gynradd Meisgyn), Penguelan Primary School (Ysgol Gynradd Pengeulan) and Penrhiwceiber Primary School (Ysgol Gynradd Penrhiwceibr). Mountain Ash has a rugby union team called Mountain Ash RFC. Rugby league club South Wales Scorpions also currently play their home matches in Mountain Ash. Nos Galan (), is an annual running road race,