I’ve previously discussed the difficulties and dangers of travel in the Regency era in a number of posts on this blog, but the Lancaster Sands in Lanchashire presented a variety of difficulties for even the most knowledgeable traveler. My first introduction to this region was via a William Turner painting, Lancaster Sands, painted ca. 1826. I was struck by the laborers and villagers walking alongside a coach in shallow water. Why would a coach travel so slowly that pedestrians could keep pace?

Lancaster Sands, William Turner. Image @Wiki Paintings. Birminham Museum and Art Gallery
As it turns out, the crossing over the Lancaster Sands to reach Ulverston was fraught with danger, especially after heavy rains. In the early 19th century travelers crossed this watery passage in the Lake District at low tide, for this was the shorter (but more dangerous) route.
The sands forming the Bay of Morecambe, covered by the sea at high water, are crossed every day by travellers whose time or inclination leads them to choose this route rather than one more circuitous, and nearly thrice the distance, inland. – The Sands, John Roby
The crossing was extremely hazardous due to shifting sands and the timing of the departure had to be perfect:
“Coach services, scheduled to accommodate the changing tides, ran between hotels in Lancaster and Ulverston. In 1820, one traveller relates, he was rudely awakened in his Lancaster hotel at five in the morning when the coach driver burst into his bedroom shouting, “For God’s sake make haste! The tide is down … if you delay we shall all be drowned.” – The Pleasures and Treasures of Britain: A Discerning Traveller’s Companion (Google eBook)David Kemp Dundurn, Jan 12, 1992 – p. 307

Otley Map, Lancaster Sands, 1818. Image @Portsmouth University.
Today, as over 150 years ago, the Sands Road requires a guide to help travelers negotiate the dangerous tide floods.
Before the railway was made, the old way of crossing the sands from Lancaster to Ulverstone must have been very striking, both from the character of the scenery around and a sense of danger, which cannot but have given something of the piquancy of adventure to the journey. The channels are constantly shifting, particularly after heavy rains, when they are perilously uncertain. For many centuries past, two guides have conducted travellers over them. Their duty is to observe the changes, and find fordable points. In all seasons and states of the weather this was their duty, and in times of storm and fog it must have been fraught with danger. These guides were anciently appointed by the Prior of Cartmel, and received synodal and Peter-pence for their maintenance. They are now paid from the revenues of the duchy. The office of guide has been so long held by a family of the name of Carter, that the country people have given that name to the office itself. A gentleman, crossing from Lancaster, once asked the guide if “Carters” were never lost on the sands. “I never knew any lost,” said the guide; “there’s one or two drowned now and then, but they’re generally found somewhere i’th bed when th’ tide goes out.” A certain ancient mariner, called Nuttall, who lives at Grange, on the Cartmel shore, told me that “people who get their living by ‘following the sands,’ hardly ever die in their beds. They end their days on the sands- and even their horses and carts are generally lost there. I have helped,” said he, “to pull horses and coaches, ay, and, guides too, out of the sands. The channel,” he continued, “is seldom two days together in one place. You may make a chart one day, and, before the ink is dry, it will have shifted.” I found, indeed, by inquiry, that those who have travelled the sands longest, are always most afraid of them ; and that these silent currents, which shimmer so beautifully in the sunshine, have been “the ribs of death” to thousands. – Over Sands to the Lakes by Edwin Waugh, 1860, Internet archive
Today, signs warn visitors about the passage, stating: “This route has natural hazards, seek local guidance.” The following link shows modern images of the route (Lake Guide Sands Road), which is still crossed today with experienced guides. A 19th century visitor related that:
It is safest to cross at spring-tides; the water then is more completely drained out, and the force of the tide sweeps the bottom clean from mud and sediment. – The Sands, John Roby
Many who took this route in days of yore, such as William Wordsworth, found the trip to be so memorable that it lived in their memory for a long time. Turner created a number of striking images of the dangerous crossing. In all of them, the pedestrians and riders stayed close to the coach as guides gauged how and where the sands had shifted with the last tides or storms. Brogs, or broken branches of furze, left by previous guides visually led the way. You can see a few of them placed in the lower right corner of Turner’s painting below.
In this dramatic painting, Turner shows the Lancaster coach struggling across the sands and being overtaken by the incoming tide in a rainstorm. (Birmingham Museum and Art Gallery). One can imagine the panic of the passengers upon seeing the incoming water, and the struggles of the horses as they pulled their heavy loads along the soft sands.
Painter David Cox also painted the Lancaster Sands crossing. His images are less romantic than Turner’s, but dramatic nevertheless: Lancaster Sands by David Cox, 1835. The route through the sands were ever-changing. The guides tested the way daily, looking for shifts in the channels and for quick sand, but even the most experienced could not prevent the drowning of carriages and coaches and the deaths of people who were caught by the incoming tides or who were trapped in quagmires. Graves in local cemeteries are testament to the many lives that were lost during these crossings.

David Cox, Sketch for Crossing Lancaster Sands. Image @Tate Britain
By the mid-19th century, the railroads provided a safer and faster route. Today, the crossing over the sands is a voluntary one and taken for the experience or thrill, not out of necessity.
More on the topic:
This site shows modern images of the Lancaster Sands: Sands Road at Low Water
Old Cumbria Gazzeteer: Lancaster Sands Road