This is as close as I'd go to the pilgrim's way from the West mentioned on https://www.walsinghamvillage.org/about/history-of-pilgrimage/ and even then, it includes a mile on the busy A148 past Harpley Dams.

Churches along the route include: South Wootton, Castle Rising, Babingley (Orthodox Chapel), West Newton (just off the route, uphill), Flitcham, Houghton (inside the hall grounds - check for opening times), West Rudham, East Rudham (just off the route), Waterden (just off the route, up a footpath, fairly hidden), North Barsham, Houghton St Giles (slipper chapel), Walsingham.

The route approaching from the South is rather simpler and plotted at https://cycle.travel/map/journey/88811