It is not appropriate to grade Canadian climbing routes with UIAA grades. We have no idea what UIAA grades or SAC scale grades mean. In Canada we use the Yosemite Decimal System (YDS) for grading. 

Rating this as UIAA grade 4 will likely be confused as a YDS class 4 route, which is VERY different and could lead some people into thinking this route is easier than it actually is.

I suggest you either remove the UIAA grading or replace it with YDS grading. 