From Edolo with a couple of hairpins starts the real ascent to Tonale Pass; last easily reachable drinking fountain is in Vezza d'Oglio at your right near a free car parking (and look at the Adamello's group). Bypassing Ponte di Legno via an external route I get to Passo Tonale as soon as the effort makes evident. Passo Tonale is like a wide saddle, as Simplonpass, surrounded by beautiful mountains. (Till here: 63Km, 210min, 1500 of devilment)
After a minilunch, I start the rapid descent to Dimaro; beware of many bends, I note many grasslands that invite you to stretch yourself on ... but the way is still long. During the ascent to Campo Carlo Magno I have to put up with hot air and a bit of tiredness (because the last ascent is not so far); splendid view of Dolomiti di Brenta helps me (it's the first time I see a Dolomiti's mountain) to face the last kilometers. (Till here: 98 Km. 345 min 2400 mt of devilment) I need water: I find on the left a drinking fountain in S. Antonio Mavignola. The weather is getting worse and wind (against my travelling direction) arises so I start at once the long descent in Val Rendena up to Tione. From Tione 4.5 Km. and 200 mt of devilment take me to the descent towards Lodrone (Till here: 163 Km. 500 min 2600 mt fo devilment) Here I have two choices
I covered the second in the other way and I remembered that the ascent is continous and straight interrupted by a 2 Km. of descent and then a more steep stretch to get to Bagolino. So I'm taking the route to Riccomassimo which turns to be more steep than the other and gets to Bagolino with a steepest descent (be careful). Bagolino is a nice village and here I take the last break before starting the ascent to Crocedomini. The surroundings environment is splendid but the ascent is very demanding: in Valle Dorizzo(1160 mt.) the last village before the pass there is a resting stretch. From here begins a hairpin's series in the middle of a pine wood. Another resting stretch: I'm in a place named Gaver (1560-1700 mt). The only shortcoming of this (lonely) place is that I can see all the remains of the ascent and, as I'm quite tired, I' m not happy in seeing it. Slowly I get to top (1943 mt. while the pass is 1 km. after at 1882) : till here 191 km. 730 min 4000 mt of devilment.
It's late: just the time to wear something warmer and then get down to Breno. The street is always in descent but very dangerous both for many bends and for "narrowness": however I get to Breno quite tired but very happy.