Great End is the Northern terminus of the Scafell massif. The normal pedestrian route to it's summit is a great walk in great surroundings but if you are looking for something a bit more challenging, a scramble up Cust's Gully provides a feeling of adventure, particularly if linked with a scramble up Skew Gill lower down the mountain. Be prepared to get wet though! Cust's Gully has a couple of awkward but short pitches where a slip could have serious consequences so only go there if you are confident in your scrambling abilities. As with all gully scrambles it's advisable to wear a helmet. The danger of rocks falling from above is ever present, sometimes they're dislodged by other climbers/walkers and sometimes by sheep. Natural rock falls also occur particularly after a freeze/thaw period or heavy rainfall. Be safe, stay within your own abilities and don't forget to leave a route plan with someone.
Great End is one of the mountains on the Lakes 10 peaks challenge, have a look at bigwalks.com/10-peaks-challenge.html to see what the others are.