I used to (between about 1999 and 2010) present training courses in LV for the University of Wisconsin, 2-3 times a year. Having tried Orlando and San Francisco in 1999 & 2000, we got about twice the bookings in Vegas, so that remained the venue for the next 9 years.
After being totally gobsmacked on my first visit, I quickly realised it was not my kind of place and I needed to escape.
The Prof. who organised the courses was happy to pay for a couple of extra hotel nights, as the airfare flying home on Sunday was less than half the cost of a weekday flight. One of my co-presenters, who was based in North Carolina, felt the same and was also a biker so, when we had time and a few dollars spare, we would tack a weekend road-trip onto the course.
The first time, we could only find Harleys to rent, which are fine on the highways, but not so good in the twisties. We returned with about 1,200 miles on the trip in 3 days and told the rental guy they were running too rich for the elevation (LV is about 2,000 feet ASL and we were probably up to twice that in the mountains). He was pissed off with us, as we had put about 10x the mileage on his bikes than the average customers, who typically just posed up & down the strip
The next time, we rented 1800cc Goldwings, which were surprisingly nimble and very comfortable, but really too big.
Finally, we found a small place that rented us a BMW 650 and a Bonneville - far more suitable and about half the price
I can't remember the company, but it was more than 10 years ago. I wonder if they grew into something like this (no connection, just found via a swift Google)?
https://www.eurocyclelasvegas.com/
Anyhoo...
Head north-East on I15 into Utah. When you get to Cedar City and beyond, say to Beaver, there are many excellent mountain roads to your right. Join the dots and find a circular route back to Vegas, via the Grand Canyon and I40 if you have time.
Take many layers of clothing. We set off from LV in 100 degree heat and woke up to frost-covered bikes the following morning in cabins near Bryce Canyon (highly recommended).
Sorry I don't have more details, but I can probably dig out some photos