Just after the fork between Silas Lakes and Christina Lakes, you officially enter the Popo Agie Wilderness (formerly you were in Shoshone State Forest). Once in the wilderness, there is no camping allowed within 200 feet of lakes or streams.
There are several streams you'll need to cross along the way. Often, the water level is low enough to easily hop rocks. However, if you attempt this hike in late spring or early summer, expect more of a tricky ford.
Crossing Silas Creek on the way to the upper Silas just after passing the turnoff to Lower Silas Lake. This is one of the crossings that could prove to be difficult with high water levels.
At the far end of Upper Silas sits a plethora of large rock slabs, perfect for a mid-hike picnic and even jumping off into the deeper water on a hot summer day.
Lower Silas Lake is a mere 0.5 mile deviation from the main trail. While its smaller size and marshy north end make it less of a destination than its larger cousin, it's still a worthwhile detour even if only for a few minutes.