If you are aiming for the first 70 miles, you should be OK up until Kenosha Pass. Kenosha Pass makes a logical bail-out point.
From Waterton Canyon to Kenosha is all below 10k ft IIRC. There may be spots of snow here and there, but the whole area (other than the Lost Creek Wilderness) is popular with MTBers.
With lower snow year in the Front Range, this area should be OK. All bets are off if we get a spring snow dump in the next month.
As an aside, the first 70 miles of the CT are nice, but nothing too dramatic in my opinion.
Utah, if starting to get warm in early May, may be more dramatic in early May vs the first 70 miles of the CT. YMMV.