An excellent venue all year round, with many areas drying very quickly after rain. Can get very hot (and midge ridden) in Summer.
More resources exist for further information:
The home of Lancashire Bouldering, with a list of new problems: www.lancashirebouldering.com
Interactive information and videos here: http://brownstones.wetpaint.com
Downloadable topo here: http://www.vimeo.com/groups/UKBouldering/view_file:2994
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Approaching from Wilton Quarries, follow Scout Road for about three kilometers. Brownstones is on the right behind a row of cottages. Please be careful when parking as cars travel quickly around the bend.