Park in the Mt Wells pullout. From the left of the parking area, follow the trail through the woods until you see a fainter trail heading right up the hill. There may be a cairn a few meters up this trail. Up the steep hill until you reach the rock face. You'll see two routes right in front of you (Witch Doctor and Monster Mash). Turn left to get to to the base of Humpback, turn right and go up the hill to get to Bubblegum Rock.
Here you can add a new climb to the Sendage database.

Please do your best to keep the Sendage database free of duplicates.
Only create a new entry if you can't find the climb in the search results.
If you don't agree with the grade, suggest a new one when you tick the climb off.
Don't intentionally misspell the climb to change the grade!