I forgot to give rationales:

1. Tenaya Lake/Clouds Rest/Half Dome/Happy Isles
This hike is familiar to almost any hiker. The key is grouping these segments into one epic dayhike qualified to be part of the TTUSDHYMD. Of course the Mist Trail has to be part of the list. Of course Half Dome has to be part of the list. And it would be a crying shame if Clouds Rest were left off the list. But I don't want to take 3 of the top 10 when these can be grouped together for ONE awesome day hike. I hope we don't resort to using an easily attainable list. So I can imagine many may vote to settle for just Half Dome---but how can you pass up that view of Half Dome from Clouds Rest???

2. Crow Pass, Alaska
Well this one certainly is not easily attainable but perhaps a description of the full day may draw more votes.
First imagine yourself having made your way to Anchorage. A beautiful city surrounded by the Chugach Mountains on one side and the Cook Inlet on the other. You are minutes away from multiple trailheads and only a gorgeous 40 minute drive to this iconic trailhead.
So this is how your day will go: First you can start the hike just about anytime you want because the season for this hike will include 24 daylight. Let's assume a 7 am start.

7:00am You leave the city of Anchorage and as you exit the main part of the city you see moose on the side of the road.

7:05am You will pass Potter's Marsh on your left which has multitude species of birds, a bald eagle nest, and a spawning salmon area.

7:07am Just a few minutes away from downtown you will cross Bird Creek and easily spot Salmon in the waters. If you are lucky you will see bears, Grizzly or Black, fishing for those Salmon.

7:15am Soon you find yourself between the cliffs of the Chugach on your left and the Cook Inlet on the right. It is very likely you will soon see a Bald Eagle soaring over those cliffs. And no less likely you will come across herds of Dall Sheep high on the cliffs and sometimes they wander down to the road.

7:20am If you can tear your gaze away from the wildlife and views on your left you can see the beautiful Susitna mountain on your right and may even catch a glimpse of Denali (Mt. McKinley) in your rearview mirrow. Also on your right, across the Turnagain Arm, you will see luscious emerald green mountains partially covered with snow all the way down to sea level.

7:25am Again on your right you will pass by Beluga Point and again if you are lucky you will spot beluga whales out in the inlet

7:35am You are approaching Girdwood and your turn off the Seward Highway to the Crow Pass Trailhead. It is very likely you will see moose out in the swamp land just before the turn.

7:40am As you complete the drive, you will pass many old gold mining areas, some still active!

7:45am Well you have not even begun your hike yet! Time to Start!

7:55am You hit the trail. Be sure to sign the register! This is a big time hike and S&R will use this register if needed for clues to find you!

The concept of switchbacks has struggled to make its way to Alaska so you will find yourself climbing very quickly. The high point of the hike will come quickly. It doesn't take long for you to be surrounded by snow topped emerald green mountains. Be sure to make noise on the trail before climbing above the tree line to ensure you don't surprise any bears.

8:45am You will approach a waterfall surrounded by snow cover. Just next to this area is an old abandoned gold mine with equipment artifacts still scattered in areas.

9:55am Even with rest breaks and a sidetrip to the Falls, we made it to the top of Crow Pass within 2 hours. The 3,500 ft. Summit will be your highest elevation point. But standing at the sign, BELOW you, you see your 2nd glacier on the hike. Because you have already passed an alpine lake fed by the first glacier on your left. If you want to spend a little extra time, you can hike right down to this glacier. At this point you have only covered about 3 miles and have about 19 to go.

I won't break down the rest of the time spots because it can vary but it is likely your way down off the summit will include an ice bridge crossing, descending snow covered hills with easy glissading opportunities, and soon find yourself in meadows with 6 foot brush surrounding you on both sides. This is where I began to think about the Jurassic Park scene where Velociraptors began plucking the men from the trail. Our group of five hikers made sure to make plenty of noise to again scare off the bears. It is also wise to avoid the Devils Club!

The rest of the hike still has plenty of surprises! A gorge crossing, waterfalls, moose, bears, beavers, eagles, Emerald Green Mountains, Snow Covered Mountains, Glaciers, etc. And don't forget the Glacier Water river crossing. Pick your poison---if it a cold, cloudy day hike the river level will be lower. If it is a warmer day, the glacier melt will mean the water level will be higher. Either way, it is painfully cold and this crossing may be the most dangerous part of the hike.

As you finish this hike between 7-8pm the light will seem like mid-afternoon. You are only 30 minutes away from great Anchorage restaurants---seafood, pizza--take your pick! But try to get a window view. A moose may wander by as you eat!