Silvertip Falls is situated on the way to the Trophy Meadows Trail, on the unpaved Spahats Creek FSR.
There is a Recreation Site campground at the same location. The campground is, however, very small and the access road narrow and rough in places. I would suggest parking on the road before the turn-off, especially if you're driving a larger vehicle.
The base of the falls is 1.6km return from the campground. The start of the trail is at the back of the last campsite. It is a narrow, often muddy route, with plenty of roots. Please note that it can be very slippery, especially after rain and during spring (and hence the '3' hiking rating here).
Technically, Silvertip Falls may be the talles waterfall in the park but there are multiple cascades and some is hidden underneath Trophy Mountain.