Ullswater Lake is at the north end of the National Park easily accessible from the M6 Penrith junction.
There are a number of villages on the west side of the lake including Patterdale and Glenridding and at the northerly tip is Pooley Bridge which is great for a stroll around and has two excellent hostelries.
It is also within easy reach of Dalemain historic house and the market town of Penrith with its castle.
For walkers Glenridding is the ideal starting point for an ascent on Helvellyn and there are campsites nearby and youth hostels.
Also on the west side is Aira Force a set of spectacular waterfalls worthy of placement on any itinerary.
In common with Windermere the lake is plied by Victorian steamers in this case the Ullswater Steamers.
On the east side of the lake is Howtown a small hamlet which can be reached by steamer and again offers great lake views and walks.
For the literary minded it is worthy of note that Wordsworth wrote the famous Daffodils poem after being inspired by seeing them on the shore of Ullswater and he described the lake thus: "it is the happiest combination of beauty and grandeur, which any of the lakes affords". Discover The Lakes would have to take issue with the great man on that I'm afraid as Coniston and Wastwater are our favourites.
Accommodation around the lake ranges from luxury hotels to reasonably priced bed and breakfasts.