CLARK, Peter K. Of Lexington, passed away on August 31, 2018. Born on January 18, 1956 in Cambridge, MA. Beloved husband of Jennifer M. Pigg. Father of Jonathan K. Clark of Lexington. Son of Elizabeth K. (Koontz) Clark of Lexington and the late Wesley A. Clark. Peter is survived by his brothers Douglas Clark and his wife Therese Flaherty of Philadelphia PA, Brian Clark and his wife Rachel Merz of Friday Harbor WA, sister Alison Clark of Hillsboro OR and many nieces and nephews. Memorial service for Peter will be held September 29, 2018, 11 a.m. at The First Parish in Lexington on 7 Harrington Rd., Lexington, MA. Interment Private. Lexington 781-862-1800