- Who
- Gemma Stevens
- What
- 3:57:46 hour(s):minute(s):second(s)
- Where
- United Kingdom ()
- When
The fastest marathon dressed in a full body dinosaur outfit (female) is 3 hrs 57 min 46 sec, achieved by Gemma Stevens (UK) at the 2017 Virgin Money London Marathon, in London, UK, on 23 April 2017.
Gemma ran dressed a Tyrannous Rex.