Activity began at New Highland Spring in 1952. The continuous heavy flow of mineral laden water has caused a very rapid development of this beautiful terrace. Prior to that time a luxuriant growth of trees, shrubs and flowers covered this hillside. The tree skeletons being engulfed by travertine stand as monuments to the former conditions.
To the right of New Highland still stands a portion of dense vegetative cover growing on a north facing slope. Most noticeable upon close inspection is the amount of undergrowth, which includes a heavy growth of mosses. What soil and moisture conditions are reflected here? Why would this area be so different?
ORANGE MOUND SPRING
The bright orange of this formation is a clue to the temperature of its water. Also, the rate of flow and the rate of deposition are very slow. It could follow then that since we have no record of this spring ever being very active, this small mound could be considerably older than those that are much larger.
BATH LAKE
Just ahead of you is a short but very steep hill. At the bottom of this hill on the right is Bath Lake, named by some of the local residents in the 1880’s. Being a quiet pool, deposition of travertine is at a slow rate and the water remains highly mineralized with limestone. According to the old records Bath Lake was entirely dry in 1926 and remained that way until the 1959 earthquake. Although the name of this feature derives from the soldiers’ habit of swimming in it, we now know that this activity damages the bacteria and algae which are part of what the park exists to preserve. Bathing in thermal features is also unsafe and unlawful.
WHITE ELEPHANT BACK TERRACE
This long white ridge is unusual for a hot spring terrace and adds a touch of fantasy to the area. Someone has said that it resembles a string of circus elephants marching over the Mammoth Terraces. Take the time to view it from different angles to see what you think!
The final section of the Upper Terrace Drive goes through a wooded area. Mule deer are frequently seen here, especially during the late afternoon and evening.
Forest vegetation along this section is dense even though it a south-facing slope. The thermal features in this vicinity are old and have been inactive for many years. This has allowed for a more complete decomposition of the travertine and an accumulation of a heavier, richer soil. Its moisture-holding properties far exceed those of the soil found at the Lower Terrace Overlook.