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


Don't miss out

Picture of Junior Summer Holidays

Junior Summer Holidays

  • Full week for £160 don't miss out
  • HYMB Junior Membership is no longer required
  • Land and water based activities available
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Picture of Girls Outdoors

Girls Outdoors

  • Outdoor Activities especially for females aged 8 and Adults
  • An ideal opportuntity for mothers and daughters to do activities together.
  • Get fit whilst having fun!
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Picture of Adult Activity Club

Adult Activity Club

  • For Adults
  • Perfect for those wanting to practice thier skills
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Picture of Adult Thursday night Climb

Adult Thursday night Climb

  • Come along and climb on HYMB'S man made climbing wall
  • With routes to test all abilities this course it designed for the complete beginner but also provides the challenges for the more experienced climber
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