Assuming the pass through Mt. Lassen National Park is cleared of snow, I'll be doing this ride on June 11th. It's 104 miles, with nearly 10,000 feet of climbing. From the low point (about 15 miles from the start), there's a 42 mile climb with about 8000 feet of climbing to the summit pass in the park. The good news is that after the big climb, there's only one "bump" up in the last 35 miles.

Last year, we rode past a couple of still-frozen lakes, and between 10' high snow banks (there's a photo gallery from last year's ride on my website).

BTW - Terry, when you said you "suffered greatly", could you be more specific? Was it just a muscle fatigue issue? Or, bonking? Or, cramping? Or, something else? What, if anything, did you learn from it?