Blencathra has been listed as a community asset by Eden District Council.
The sale of the Cumbrian fell was agreed with an unnamed bidder for more than the asking price of £1.75 million on Friday.
Community group Friends of Blencathra were disappointed not to win the sale but say they are delighted the mountain has been designated a community asset.
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The 12.5 hour walkout by 63 GMB members got under way at 6am this morning and will continue until 6.30pm this evening.
37-year-old Graeme Haddon pleaded guilty to the offence which happened in his home village of Lamancha near West Linton at the weekend.
Laura Price was dragged into an alleyway, close to Penrith Leisure Centre, where she had her head jumped on and kicked "like a football".