"Mt Bliss" has the sound of some Alaskan 17er, or maybe a neighbor of Mt Vinson. Set your expectations a lot lower...
In fact, it's a meh peak in the front range of the San Gabriels and it's just 3,720' or so. The hike to it is along a fireroad with zero shade. OTOH, it has mostly good sight lines so you'd probably see animals heading your way. And, it is or was on the LPC ("Lower Peaks Committee") list. There's a lot on its fire history etc here.
What's different about the fireroad is that it's quite steep. Biking the beginning would be fairly easy, but I could see myself pushing through a lot of the uphill and then doing a lot of praying on the downhill.
There should be, in the normal course of affairs, zero navigation issues. Except, I made it interesting. The spur trail to the peak is the first junction on the trail. It's on the right of the trail and it makes a sharp turn. I messed up coming back down that spur trail, forgetting that I'd taken two turns to get to the peak. I mistakenly took a different fire road and then had to go back uphill for a bit after I realized my error.
Despite that, total travel time was about 4 hours.
One nagging worry throughout the hike was that I'd parked where AllTrails says, and that is not at all optimal. There's a sign that says the max time is 3 hours and there have also been break-ins at that lot. Others park along the road, but there are No Parking signs. A slightly safer location appears to be along the Van Tassel Motorway itself, right after it turns off from Fish Canyon Road.
However, it looks like it would be even safer to park at Encanto Park down the street. That will add at least a mile to the hike but there were a lot of people there so it's probably safer.
Another option I only found out after I got back is that suggested at the link above: parking near the Opal Canyon Road and Brookridge Road intersection. On the satellite map you can see a trail that heads up to the Van Tassel Motorway, but I don't know what condition it's in.
As for the Motorway itself, there are lots of rocks in stretches but nothing major, and it wasn't that loose (but it had rained a couple days before). There are no major ruts. Unfortunately, the summit has been bulldozed to form a firebreak. And, the views in most directions are marred by transmission towers, power lines, and fireroads off in the distance. The view to the Mt Baldy area would be OK, if not for the bulldozed trail you can see in the photos.
I might be back, but only for the exercise and, maybe just maybe, to see how much of it I can bike.
