Trionium – free race places for marshals and other races information

Online entries have now closed for the Midsummer Munro half marathon and Picnic marathon around Box Hill, near Dorking in Surrey on 21 June (limited entry on the day is still available by pre-arrangement withrob [ at ] trionium [ dot ] com).


However, we still need marshals on Saturday 21 JuneMarshals receive a free place in a future Trionium race, as well as race goodies and picnic. Marshals are needed from 1pmonwards.


If you can marshal, please emailrob [ at ] trionium [ dot ] com for further information (please include your mobile number).



We will also organise the Ashtead Dash (short race, carrying bags of fertiliser, with water hazard) at Ashtead Village Day on Saturday 14 June, as well as kids’ very short fun runs – entry free. Please come along and enjoy the fun.


Entry is also open for the Ashtead 10k and Fun Run (Sunday 7 September) at – please note the earlier-than-usual date. 


Entry is also open for the runs below.


Due to their small size and popularity, all of the races fill up well before race day: Please enter early to ensure your place!


Thanks and kind regards,


Rob McCaffrey – race organiser