The phrase "smuggling trails" is a correct and usable phrase in written English.
You can use it to refer to secret pathways or routes used for transporting illegal or smuggled goods. For example, "The police have been following the smuggling trails in the area to try to apprehend the criminals."
The Border Patrol has, for instance, outfitted many of its agents with night vision goggles to spot border jumpers and global positioning devices to map out smuggling trails.
Just as ancient forms of networking co-ordinate smuggling trails across different countries, so modern networking allows a Libyan smuggler to get a Sudanese counterpart to collect payments from a migrant's family in Khartoum.
We amble off on a lazy nature trail, following the droveways used as smuggling trails during the Spanish civil war (when Andalucía was known simply as el hambre, the hunger).
A good start would be using air attacks to destroy drug convoys carrying opium on smuggling trails toward the Pakistani border, using the same infrared technology employed along the Mexican border to avoid hitting civilian vehicles.
Bloudan is a Christian town – Zabadani is largely Sunni – and they have been on the front lines of Syria's war; those old smuggling trails now help to bring the tens of thousands of Syrian refugees into Lebanon, swelling now to 1.3 million, of whom at least 780,000 have been registered by the UN.
These offal-streaked Dickensian mills are also magnets for desperate immigrant laborers who, in some cases, blaze the smuggling trails that run up into the Corn Belt from Mexico, home to the gang lords who own the superlabs that, increasingly, dominate the meth trade.
From here, they join the smuggling trail to Libya, experiencing similar horrors to Eritreans crossing the desert from Sudan – kidnap, torture and death by dehydration.
On the smuggling trail, Nimrod had told me that his earnings from coffee almost match his net salary as a teacher: about £200 a month, but a sum that can make the difference between quality of life and mere survival.
The Taliban lashed and even executed Afghan drug users, but hundreds of tons of opium, and thousands of pounds of its derivative, heroin, were smuggled over donkey trails leading from here into Pakistan, and on to the West.
To reach the world market, the drugs are smuggled out along well-trod roads and donkey trails into neighboring Pakistan and Iran.
Traveling by Blackhawk helicopter in the shadow of Kosovo's snow-capped peaks, Mr. Rumsfeld surveyed the intricate networks of mountain trails used by Albanian rebels to smuggle weapons into Macedonia from Kosovo.
