Also, heavy weather.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
How to use heavy going in a sentence
The snow on the upper glacier was soft and made very heavy going.Mount Everest the Reconnaissance, 1921 | Charles Kenneth Howard-Bury
Lionel walked a little in front of Winn; the snow was soft and made heavy going.The Dark Tower | Phyllis Bottome
The walk to Pontresina is the coldest and darkest of winter walks, and the snow made it heavy going.The Dark Tower | Phyllis Bottome
The snow was deep and the sledge teams had heavy going at first.The Young Continentals at Bunker Hill | John T. McIntyre
The water was pouring down the hill sides, every deep deer track was a torrent, and it was heavy going through the marshes.Sport in Vancouver and Newfoundland | John Rogers