Elevation and Boat Speed

[UTFISHING]

Having grown up at sea level, or close to it, I was spoiled with fast boats. In the Midwest and East Coast, a well equipped multi species like a Lund or Crestliner could easily exceed 50 MPH. My old man had a 22' Crestliner with a 250 verado that went 61 MPH once.

So imagine my surprise when I bought my first boat in Utah (an 18' Crestliner with a 115 Johnson) and went to Strawberry, and could only achieve 34 MPH. Quite the rude awakening on the effects of altitude.

Then I sold that and bought a 19' Duckworth with a 140 jet outboard that was a dog... Got 25 MPH at Strawberry, 28 at Deer Creek. I recently repowered to a 175 Pro XS and am seeing 46 MPH at Deer Creek.... Haven't been able to get it on strawberry yet.

So my question: what's fast in Utah? Seems like 40 MPH is surprisingly difficult to achieve. How fast does your rig go?

56 57 mph at Willard with a full tank but yes it drops off at strawberry. 

I have a 21' Ranger Reata and a 225 Verado.

I also was surprised at the drop in speed and power from Willard to strawberry especially with a supercharger and injection!