Tunnel
On a Steep Shingle Beach
The engineering challenge — meet in the middle — adapted for steep shingle beach conditions.
About This Hole
Two people dig from opposite sides of a sand mound and try to connect underground. The moment a hand reaches through from the other side is one of beach digging's great payoffs. Requires firm, damp sand and a mound of at least 60cm high. More engineering than excavation.
About This Beach
Pebble and shingle beaches slope sharply into the sea. While you can't dig a traditional sand hole, the loose stones allow for brilliant channel, dam, and moat building above the tideline where any small amount of sand collects. Think construction more than excavation.
Compatibility
Ratings
Best Seasons
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What You'll Need
- spade
- hands
How to Dig It — Steep Shingle Beach Edition
- Build or identify a firm sand mound at least 60cm high.
- Two diggers start on opposite sides at ground level, angling slightly upward.
- Dig slowly and carefully — the roof needs to bear the weight above.
- Keep the tunnel no wider than 20cm to reduce collapse risk.
- As you get deeper, switch to hands rather than spades for control.
- When close, wiggle fingers through and feel for the other side.
- Collapse the tunnel fully before letting children near it.
Variations: For a simpler version, dig from one side only and see how deep you can go before it collapses. For older children, try an L-shaped tunnel around a corner.
Seasonal Tips for Steep Shingle Beach
Spring
Ideal conditions — damp sand holds the tunnel roof well.
On this beach in spring: Stones shift and collapse more than sand. Hands and knees take a beating — gloves recommended. True hole digging is limited to sandy pockets.
Summer
Only attempt in damp sand below the dry surface layer. Dry sand tunnels collapse instantly.
On this beach in summer: Stones shift and collapse more than sand. Hands and knees take a beating — gloves recommended. True hole digging is limited to sandy pockets.
Autumn
Wet sand makes this almost too easy. The tunnel stays open longer.
On this beach in autumn: Stones shift and collapse more than sand. Hands and knees take a beating — gloves recommended. True hole digging is limited to sandy pockets.
Winter
Cold wet sand tunnels exceptionally well. Gloves recommended.
On this beach in winter: Stones shift and collapse more than sand. Hands and knees take a beating — gloves recommended. True hole digging is limited to sandy pockets.