Hertfordshire's outdoor education centre

Herts Young Mariners Base outdoor centre, known as HYMB, has been delivering high quality outdoor education sessions to adults and young people for over 50 years.

We offer a variety of adventurous outdoor activities to anyone aged eight and over and can provide tailored sessions for individuals, schools, colleges and youth groups


Get set for Easter

Picture of Junior Easter Holidays

Junior Easter Holidays

  • HYMB Junior Membership required
  • Land and water based activities available
  • Full week for £120
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Picture of Junior RYA Stage 2 Improver's Sailing

Junior RYA Stage 2 Improver's Sailing

  • HYMB Junior Membership required
  • Book stage 1 and 2 together for £200
More Info