Road is getting overgrown (expect pin-striping), but road surface is smooth. It was no problem in a small AWD hatchback to 810m, where we were stopped by snow. There was enough snow for skiing from about 900m. Melting fast though. Lots of alder poking through the snow around the 5km-6km.
Made it to the sun god TH in a Honda CRV. Some small cross ditches, a couple medium deep ones near the TH but they are wide so I made it ok. Scraped the hitch a couple times but the road surface was generally ok, some boulders but my medium clearance was enough. The alders are encroaching the last few kms, definitely pinstriping. The beginning of the road isn't too bad but it gets progressively worse towards the TH
Short icy snow patch will stop most vehicles at around 3.4km (1040m elevation), but road is then generally bare for another couple of km before continuous snow starts. Up to where we stopped, road would be passable by medium clearance SUVs. Minor pinstriping.
The road may be passable by high clearance. 4WD not needed. However, it is extremely brushy. A brush tunnel will occur near the end. Lots of scratches will appear on your car.
[From Sean Patterson] - Tenas Crk FSR remains snowed in from the turnoff with Birkenhead. Despite very hard crusted snow we still couldn’t get much further than 1.5km up Tenas FSR even with chains. So we had to accept defeat and start walking.
The heavily crusted snow allowed us to basically walk the length of the road with no spikes or snowshoes.
Road is bushy but if you go slow shouldn't get too many pinstripes. I walked in front of the truck & did some alder clipping above elevation ~1,275m. Some small waterbars but we saw a Mazda 3 which had made it to approx. 1,300m. Parked at Sun God/7pm trailhead.