Approximate - nearest available gauge. Use as general reference only.
Note: all which follows is from online review of topo maps and aerial photos, and should not be expected to be entirely accurate or complete. Anyone having firsthand awareness (from run or scout of this stretch of river) is encouraged to help out your fellow boaters via the "Add a Comment" button which should appear below for all registered/ logged-in users.
Mileage is being measured from listed put-in, primarily since this section is so likely to be done as continuation of a run on Hunting Cabin River (which comes into the Echo just downstream of our listed put-in. Anyone wishing to do just the Echo River run may prefer to look for a different put-in to cut off much of the nearly four miles of flatwater which starts the run as listed here.
A bit of boulder garden rapids quickly builds into a fine short (just over 0.1 mile) rapids, likely class II, maybe building toward class III.