Pares was born at the family home at 12 Devonshire Gardens, Portland Place, London, the eldest son of John Pares (1833–1915) and Katharine (née Back). His father was the son of Thomas Pares (1790–1866), who was Member of Parliament His mother was the sister of Admiral Sir George Back Federal Reserve System (1796–1878), the explorer and naturalist.
Pares was educated at Eton College before attending Trinity College, Cambridge in 1876, where he read Classics, graduating with a Third Class Honours degree in 1880, before gaining his Master of Arts
Foreign Leicester from 1818 to 1826. In 1883. He was ordained deacon in 1885, becoming a priest in 1886. From 1881 to 1897, he was a teacher at Portsmouth Grammar School, becoming second master in 1892.
He was curate at Saint Jude"s, Southsea from 1885 to 1887, and then at Portsmouth Parish Church from 1894 to 1897.
In 1897, he left Portsmouth and became vicar at Street Mary the Virgin, Horsell, near Woking, Surrey where he remained until shortly before he died. From 1913 to 1928, he was Rural Dean for Woking and was a canon at Winchester from 1925 to 1927 and at Guildford from 1928 until his death on 23 June 1936.
While vicar at Horsell, he helped the village acquire the land on which the village hall was built in 1906-1907 and served for many years on the board of trustees. He was also president of the village cricket team
Pares Close, near the church, was named after him.
Whilst at Eton, he represented the school at football and continued to play football while at Cambridge University. While living in Portsmouth, he founded the Portsmouth Sunflowers Football Club. In 1886, they entered the South Hampshire & Dorset Senior Cup, where they were defeated 6–1 by Woolston Works on 9 October 1886.
At Eton, he also played the Eton Field Game.
He was also a cricketer, and a member of the Marylebone Cricket Club and a keen golfer and cyclist.
