Are you camping? Or staying at a motel/hotel as your base?

We just returned cycling a few hrs. ago today from Banff National Park Area (Alberta) which is over 400 kms. north of Glacier National Park. The weather during the day has been around 80 degrees F or so (sorry I'm thinking in metric 18- 22 degrees C and too lazy to do the conversion right now) sunny or with some cloud. Just perfect weather for us.

Yes, the temperatures do drop in the mountain areas in the evenings. I guess it was around 45 degrees F.

We stayed at a hotel. So evenings we never worried much.

Thermal tights would be overkill. At least your cycling longer shorts. A light long sleeve fleecy, a light cycling jacket with some water repellancy in case it should drizzle. I also brought and wore once a very light fleecy vest which I took off within an hr. Only for 2 mornings.

The temperature rises very rapidly in bright sunshine by 10:00 am or so. However around in open road areas there could be wind at times. So the light vest under a jacket with short sleeved jersey works well.

I brought along light windpants for rain but I never had to wear them. Just always prepared. But I have worn such pants during unexpected cold on summer touring bike rides or when it rains. So that's how I keep my legs warmer if I need to in the summer for a few hrs. and take them off.

P.S. We hiked about 18 kms. from Waterton National Park in Alberta which is right beside/against Glacier National Park and into Montana. Yes, one does cross the international border and sees the clear-cut through the forest for the 49th parallel. There is a customs officer there....

So bring your passport, skinmini....you never know!!

Susan and becca: Great photos!