If going up from the edge of Dunster, up the end of Grabbist, thats a tad steep for any gear.
There is a more gentle path off the back road to Minehead, head up to butter cross, then turn left before that, and pass the graveyard, turn right and follow path up to the top, much more gentle that way. Once on top flattish, with a long gentle climb on fireroad. Couple of options down to Wooten Courtney, one pops out next to the village hall and the Dunkery Beacon Hotel, loose and lumpy fun from memory, there is a small village shop with quirky opening hours, or try the hotels bar.
Couple of routes across and up to webbers post or go long and head to the iron pits and up to the beacon.
When you hit tarmac, you still have loads of climbing left 🙂
If a nice day, expect an ice cream van at Webbers post, tea shop down in horner, you might find an ice cream van further up, maybe not.
If tired when heading back, get to Wooten Courtney and stay on the road, as you leave the village turn left onto a back road, fairly flat gentle pootle back to Dunster, this goes behind Knowle riding school, and down to Avill farm and pops out at the edge of Dunster, very close to a pub, this is a single track back road and fairly quiet, expect to bump into horse riders from Knowle. If you follow the road round to the right you have a steep junction that puts you on the main A road, expect to play with traffic doing 60+ on the main road.
Depending on how fit you are, it’s doable on singlespeed, many do a bit of walking 🙂