Big Bend Ranch State Park with the Tierra Grande Chapter of Texas Master Naturalists to Cinco Tinajas.
Some great information on this trail can be found in the park's El Solitario newsletter from 2007:
"Cinco Tinajas Trail is a short 30-minute stroll from Sauceda. The round-trip hike of less than 2 miles has an elevation change of less than 200 feet. At the end of the mile-long trail lies a close-up view of
the tinajas. And there’s more. The canyon rim overlooking the Cinco Tinajas provides incredible panoramas of the far reaches of the park. Tinajas are desert water basins carved in bedrock by the erosive force of sand, gravels, cobbles and larger stones suspended in rushing water. Many tinajas, including these, hold water even in the driest of times. Knowing the location of one of these natural water basins was, and is, knowledge that could save a person’s life.
Cinco Tinajas lies in a narrow slot canyon that contains a tributary of Leyva Creek. Almost all rain falling onto the upland area around Sauceda drains into this slot of dense volcanic rock, concentrating a powerful erosive force on a fault or crack in the lava. Over millions of years the erosion formed five (cinco) interconnecting pools."