The mountains near Marble Mountain hold snow for longer at a lower elevation than other nearby mountains, so keep that in mind. Even at 2600 feet elevation, which is pretty low, there was still 2 feet of snow on the road all the way up to where I left the road to bushwhack the rest of the way to the summit.
There is a bridge out but someone has laid the guardrails from the old bridge across the creek and that works for crossing on foot. You could carry a bike across if needed.
Based on my experience snowshoeing this, the road all the way up to the bushwhack should be bikeable if you wanted to bring your mountain bike. I'm not sure how much longer that will be the case, but for now it is not yet grown over.
The bushwhack is steep and moderately thick but short. It shouldn't present too much of a challenge. The length of the hike is surprising. That's why I recommend a bicycle if you're so inclined, especially if you'd like to activate Marble Mountain as well.
I ended up with 4.9 miles and around 900 feet of elevation gain when all was finished.
Tha activation zone is a challenging place to set up an antenna. Try a vertical if you have one. I made zero VHF contacts into Portland. Folks reported they just couldn't copy me. Maybe a yagi with some power would help rectify that situation.
Overall, it's a boring summit, but it's definitely there. It is a mountain you can climb and activate.