Liam Nash had put the Urchins ahead on the half-hour but Sparks’ long-range shot earned Dom Di Paola’s team a deserved point.
They’re back in action in a Sussex Senior Cup quarter-final away to Eastbourne United on Tuesday evening.
See John Lines’ pictures from the game at Hornchurch on this page and the ones linked, and get the latest from the Hornets camp in the West Sussex County Times – out on Thursday.
29. Hornchurch v Horsham pictures by John Lines (54).JPG
Horsham FC in action at Hornchurch in the Isthmian premier division Photo: Picasa:John Lines
30. Hornchurch v Horsham pictures by John Lines (23).JPG
Horsham FC in action at Hornchurch in the Isthmian premier division Photo: Picasa:John Lines
31. Hornchurch v Horsham pictures by John Lines (48).JPG
Horsham FC in action at Hornchurch in the Isthmian premier division Photo: Picasa:John Lines
32. Hornchurch v Horsham pictures by John Lines (51).JPG
Horsham FC in action at Hornchurch in the Isthmian premier division Photo: Picasa:John Lines