With the Trailhead Direct shuttle, I did a long series of trails: the Teneriffe Falls Trail up to the waterfall, the Kamikaze Trail to the top of Mount Teneriffe, the connector to Mount Si, then the Mount Si Trail down to the Douglas Fir and Boulder Garden Trails

Conditions are good up to the Kamikaze Trail. There are intermittent patches of mud up the Kamikaze Trail, and it's in an unmaintained condition; especially toward the beginning third, you will need poles or your hands to climb over boulders or small ledges. It's strenuous and rarely forgiving, but effective at getting you to the summit. I wouldn't descend on it

Patches of snow appear near the Mount Teneriffe summit which can be avoided. However, there is more snow in the woods on the proper Mount Teneriffe Trail, which require plodding in the snow or taking a path of puddles. Good footwear is recommended but microspikes aren't needed. On the Mount Si side of the connector, there's very little snow

Conditions from the Mount Si summit down to the Douglas Fir Trail and out to the Little Si Trailhead are peachy. Will come back to climb the Haystack some later day. Nothing exciting to report condition-wise

I like to leave trip reports for those that also don’t feel like all stars that can do Tenerife-Si and more in a day. I’m around 5’11 175 lb and clearly out of shape when it comes to hiking considering needing to pause on the way up many many times. 

Arrived at the trailhead at 10 AM, the first row of the parking lot had a lot of cars in it but I got a space without having to go to the second row. The parking lot has some big potholes. Most I could dodge but one on the way out was unavoidable.

On the way up you were mostly by yourself, though if slow like me you have a trickle of people eventually come up and overtake you. Other than for a tiny time in the old growth area, it’s up the whole way. Getting to the rock outcropping that the WTA say is a good lunch/common turn-around spot took me 2 hrs and 40 mins, with many stops to rest for a minute on the way up. It didn’t seem long after lunch and a rest to see what I -believed- to be the proper peak, based on the scramble/rock-climbing needed to go to the top. I could be wrong though, I turned around and headed down from there. The way down was pretty smooth and took me 1 hr and 40 mins. It probably could have been 10-20 minutes quicker but I stopped a number of times to keep distance between myself and another individual. 

There were good views at the lunch spot. Unfortunately today it was just a bit too cloudy to see Rainier but Seattle was visible in the distance. 

Not sure why WTA rotated all of my pictures to the left, but well, here they are, rotated.

Portable Toilets @ Mount Teneriffe's TH: Both are w/o TP. The handicap one is nearly full.

Trail Conditions: Intermittent snow starts @ ~4400' on Kamikaze trail. They are easily either avoidable or have great foot holes to follow. Check your map often as some winter detours have created paths that you no longer need to take. When in doubt, just take the path that goes up as the trail is relentlessly upa di up up. Coming down Mount Teneriffe's trail, easy intermittent snow on mostly flat ground continues until ~4000'. All snow were easily manageable with my trail runners and poles. Being careless towards the end, my foot slipped on a rock 5 min. before Little Si's TH, leading to an ankle sprain. This reminded of the last time I saw someone limping down Little Si with the assistance of two of her friends. The mountain may be little, but it doesn't mean you should be careless with her. Lesson learned, don't text while hiking downhill.

Suggested Additional Gear: Trekking poles for the snow. Warm gloves for the snowy area.

Hiked up Mt Si trail, then down the backside, down the Teneriffe Trail and back via the Roaring Creek Trail. 8.75 miles, 3350'.

Trail is in good condition. Lot less people on the backside. A lot nicer hike so always like making a loop out of this one.

Peaking Trillium at the top around 3800'. Lots of hungry chipmunks and grey jays. Saw the endemic I-90 "drone" bird at the top unfortunately.

Overall a great hike with great weather!

I tackled Mount Teneriffe and Mount Si in a day. I started at the Teneriffe trailhead and made my way from there to Teneriffe Falls, then going up the "Kamikaze Trail" to Teneriffe peak. That is one steep trail. I'd say it's tougher than Mailbox Old Trail with more scrambling than hiking. The condition of that trail was OK. At one point, I lost the trail and got side tracked by about 100 feet of elevation before finding it again. Towards the peak above 4,000 feet, snow made it difficult to stay on trail.

Teneriffe peak is snow free, but you have to scramble across some snow to get there.

I crossed over from Teneriffe peak to Si peak along the ridge. The trail on the ridge has plenty of snow and you will get wet feet if you're already wearing your summer boots like I did yesterday. Snow shoes are overkill but spikes can be useful on steeper sections. Gaiters are very helpful. Hiking poles are a must.

By the time you reach Mount Si, the snow is all gone.

I scrambled up the haystack with nobody else on it. Checked.

I circled back from the top of Si going down the Si trail and cutting across on the connector trail.

The entire loop ended up being a bit more than 28km or 17 miles and change.

My hike on CalTopo.