There are some serious mountaineers out there, that when they go on a mountain trip they are going on an expedition. Perhaps you are new to this type of outdoor adventure, and you are not quite ready for something so intense. In that case you may want to start out with a weekend mountain trip. You can not only do this as a great weekend getaway, but also as a learning adventure.
The first thing you want to do is plan on where this mountain trip is going to be, so you can research as to what the weather and terrain will be like. Even in the summer months, the mountains are quite a bit cooler, and you will want to make sure you have enough warm clothing with you.
You also need to determine what kind of activities are going to be available to you while you are there. Some mountain terrain is ideal for cycling. If you have the proper mountain bikes, then you may want to pack them up to take with you. If the mountains are ideal for skiing, then the same thing goes. In either case, there is probably a town close by that caters to mountain tourists, and they may have rentals of the pertinent equipment that would be used for most of the activities.
Always check what the weather is going to be in the region where you are taking your mountain trip. There are times when it can become dangerous to be in the mountains in adverse weather conditions. If it appears that the weather is going to be bad, then it may be best to postpone your trip. You may want to pack two pairs of shoes even though you want to travel light. Your footwear is going to be one of the most important pieces of your attire.