Tioga Road除雪開始日：　5月1日

1980年から2005年までの26年間のTioga Road開通・閉鎖日グラフ。一番下の棒は1980年。一番上は2005年。横軸は1月1日から数えた日数で、1グリッドは10日。5月31日は151もしくは152日目にあたります。開通が一番遅れた年は1998年で7月1日。閉鎖が一番早かったのは2004年で10月17日。
除雪開始日が5月1日との発表がありました。
5月中のTioga Road開通の可能性は99%ないと思われます。6月末（独立記念日前）の開通を目指すといったところでしょうか。
高地での雪の状況は：
Spring has been very wet and snowpack at the higher elevations is very deep (109 inches at Tuolumne Meadows as of April 5; the snowpack hasn’t been this deep there in April since 1983). Snow has also fallen at the lower elevations, however the snowline is between 5,000 and 6,000 feet.…
と、1983年以来の雪の深さだそうです。ちなみに1983年のTioga Road開通日は6月29日でした。
2005年（去年）のGPとTioga Rd.の除雪の記録を再掲載
今年の開通日予測の目安になると思います。去年は意外と早くGP rd.が開いたんですね。

Tioga Road除雪の記録
4月15日
除雪開始
4月21日
Tioga Road April 21, 2005
Starting location: 4.3 miles East of Crane Flat
Ending Location: 4.8 miles East of Crane Flat
Distance plowed today: .5 miles
Snow depth: 11 feet
5月13日
Starting location: At White Wolf, 14 miles from Crane Flat Gate
Ending location: 14.5 miles from Gate
Distance plowed today: .5 miles
Snow depth is 15+ feet and getting deeper
Tioga Road progress for May 14, 2005
Starting location: 14.5 miles from Crane Flat Gate
Ending Location: 15.1 miles from Crane Flat Gate
Distance plowed: .6
Snow depth is 16 feet
May 16, 2005 10:57 PM
May 16th, all work on Tioga was suspended so crews could respond to the flood event in the Valley
May 17th.
Starting location: 15.1 miles from Crane Flat gate
Ending location: 15.6 miles from Crane Flat gate
Distance plowed today: .5 miles
Snow depth is 15 feet
Tioga Road progress May 21
Starting location: 20.6 miles from gate
Ending location: 22.2 miles from gate
Distance plowed: 1.6 miles
Snow depth: 6 feet
Tioga Road progress May 23
Starting location: 22.2 miles from gate
Ending location: 22.5 miles from gate
Distance plowed: .3 miles
Snow depth: 8 feet
Tioga Road progress May 24
Starting location: 22.5 miles from gate
Ending location: 25 miles from gate
Distance plowed today: 2.5 miles
Snow depth 4 feet
Tioga Road progress May 25
Starting location: 25 miles from Gate
Ending location: 25.8 miles from gate
Distance plowed today: .8 miles
Snow depth: 7 feet
Tioga Road report for May 26
Starting location: 25.8 miles from gate
Ending location: 26.6 miles from gate (May Lake Road)
Distance plowed today: .8 miles
Snow depth: 5 feet
No forward progress today (May 27). There was a substantial rock/mud slide in avalanche zone one. Slide was cleared by noon, however other emergency road repairs at several places throughout the park kept road crews busy the entire day.
Tioga Road report for May 31
Starting location: May lake turn-off
Ending location: Olmsted parking lot
Distance plowed today: 1.8 miles
snow depth: 4 feet
On June 1st, we will be preparing to cut through the Olmsted Avalanche zone. June 2nd, we intend to cut through the zone at Olmsted. Starting early, when there is a good freeze is imperative. Once we have cut through, the crews will go back west and let the snow takes its course. No work will be done for the rest of the day. An assessment will be done on Friday morning to see if it is safe for the crews to go through and proceed east.
Tioga Road report for June 2
Park crews were able to cut through the Olmsted avalanche zone today. After the cut, all personnel were sent back to work west of the zone while the avalanche team checks out the zone and waits the normal 24 hours to see if there will be any movement. If there is no activity, the crews will proceed eastward tomorrow.
Tioga Road report for June 4
Today, the crews were able to plow through avalanche zone 21 (Marmot Dome) and meet up with where the County left off. This does not mean that the road is opened. From Olmsted Point to Tuolumne Meadows, the road is plowed only a bit wider than one lane. Equipment failures have lead to this. We still need to widen these approximately 10 miles of road. We still have three active avalanche zones. In these areas, the road will remain only one lane wide until the zones are downgraded. The avalanche team believes Olmsted zone will probably remain a n avalanche zone for at least two more weeks. The road crews still need to plow out the administrative areas, widen the roadway, do ditching, road repairs, sweeping, and most of the signs along the road will need to be replaced. We still do not have a set opening date. We will be opening Segment 2, from Walker Party to Yosemite Creek, Thursday, June 9th.
Tioga Road report for June 14
Avalanche zones are still active on the Tioga Road. Park staff traveling on the road for administrative purposes are required to have avalanche training and equipment.
On June 14, crews began to remove boulders from this rockslide near Olmsted Point.
Tioga Road report for June 16
On June 16, crews began to remove avalanche debris and snow from potential boulders from this rockslide near Olmsted Point.
Tioga Road開通　6月24日
The Tioga Road will open on Friday, June 24, at 8 am.

Glacier Pt. Road除雪の記録
NPSによると、今年のTioga Roadの除雪(4/15に開始)には、かなり時間がかかりそうです。
There is no estimated opening date for 2005.
Plowing of the Tioga Road will begin on April 15th (and on April 18th for the Glacier Point Road). As of March 1, snowpack is significantly above average and, based on wind conditions this winter, it’s expected that many trees will be down (but covered by snow), which could slow plowing operations.
二日前(5月10日)で、7.4マイルほどの除雪を終えています。あと25%を残すだけです。まだ正式発表はありませんが、月末のメモリアルウイークエンド開通を目指しているのでしょうか(かなり難しそうですが)。黄色点：左手前はTunnel View、右はBadger Passのスキー場(除雪開始点)。奥は左からCurry Village、Glacier Point、除雪到達地点。東は上側。
5月11日の状況がUPされています。８.４マイル地点です。除雪終了のあとすぐには開通しませんが、なんとなく５月末開通ができそうな気配です。
金曜日(5月13日)の状況です、SUYAMAさんのコメントのように駐車場まで達しました。まだ開通の予定日は出ていません。
Glacier Point:
We are now at the parking lot. Although we are at the Glacier Point parking lot, there is still a lot of work to be done before any traffic can be allowed to Glacier Point. We have to widen the road (cut back the snow banks), trim trees sticking out into the roadway, road repair, ditching, and all of the sign work. We also need to plow out all the turnouts and access roads.
5月26日：　Glacier Point Road開通