The LEA VALLEY REGIONAL PARK (LVRP), is a regional natural park which has  many attractives, from BOW CREEK (BLACKWALL), —the mouth of the river Lea— to the original springs in HERTFORDSHIRE, to the  North of Greater London.

Natural spaces and former industrial buildings mostly related to the treatment  and provision of drinking water to London (part of the water consumed in the NE of the metropolis is supplied from here), a couple of small museums, places to eat and drink, and the chance to do a good exercise.
A lot is an offer. 

Especially this a place to walk and cycle freely, in contact with nature. You are going to find panels with maps and information. There is also accommodation in the area : campsites, cottages, and an a youth hostel. 

Not only a nature is available. You can easily reach the ancient villages like LEYTON, LEYTONSTONE (where ALFRED HITCHCOCK and DAVID BECKHAM were born) or WALTHAMSTOW (where the man  who designed the modern bicycle was born) to the East of The Valley  Or HOMERTON, HACKNEY, STOKE NEWINGTON o TOTTENHAM, to the West. 

The OLYMPIC PARK is physically part of The Valley but is not run by its authority. From it you you can access to the North (HACKNEY MARSHES) or to its South (THREE MILLS ISLAND AND GREEN>>>>, and the <<<<BOW CREEK and  EAST INDIA DOCK).

Although this web deals only with the OLYMPIC PARK and THREE MILLS, I would like to take the opportunity to encourage you to reach WALTHAMSTOW, from STRATFORD by bus. 
The site of the ancient VILLAGE (including a small local museum and the church) is only a mile away from the Victorian suburb (which you can reach on the VICTORIA LINE , directly from Central London) or on the OVERGROUND.

Walk the whole of the HIGH STREET and, after enjoying the longest street market in the world, carry on COPPERMILL LANE or, still better, LEYCHA ROAD (conservation area, charming houses) and then COPPERMILL LANE. This route takes you almost to the banks of LEA RIVER, and to the feet of the WALTHAMSTOW WETLANDS. You will not miss the COPPERMILL PUB, and you can visit the COPPERMILL TOWER. 

If you cross the river, along the picturesque HIGH BRIDGE, you can have an cuppa in the BOATHOUSE or in the café in SPRINGFIELD PARK. After the park (which is uphill),  you will find yourself in STAMFORD HILL, where a  large Jewish Ultra-Orthodox community lives.