Hey there, I'll take a swing at your questions: 1) I think you could totally go your own way, but you'll miss a lot/most of the good trails out there. So much of what is good that we saw in Iceland was in the highlands... More
Hey there, I'll take a swing at your questions: 1) I think you could totally go your own way, but you'll miss a lot/most of the good trails out there. So much of what is good that we saw in Iceland was in the highlands - areas inaccessible without a "superjeep." Ultimately, Iceland is not a place with "mountain bike trails." It's got hiking trails you can ride on. Many are not on maps. Most are not on Strava or any bike related sites. Guides are helpful because they really know what is doable and what isn't. 2) I think Skogafoss could be done off Rte 1 and is probably the highest density waterfalls to km ride you could do in Iceland. It's a lot of climbing (dirt road) on a bike, but the downhill payback is awesome. There is also a trail near Reykjavik called "the Edge" which could be easily driven to. 3) I'm from Boulder, so I think we're probably speaking the same language about weather. We were in Iceland for 2 weeks. We saw temps about 60 deg F on one day. We had two "mostly sunny" days. It's generally cold, drizzly, and windy. If you dress for that, you'll be fine. I was almost never cold, but I wore a lot of wool. As previously mentioned, trails are all "wilderness" in Iceland. Not many signs. 4) There were a couple folks on our tour that rented bikes. They were pretty darn nice bikes - not a Pivot - but nice. I would suggest thinking about a one or two day guided trip and leave it to the pros. You could easily talk with Icebike or one of the other companies and find one that can work with you and your gf. Rent bikes through them for your rides and have a great time. The rest of the trip, hike. Oh, one more thing. Consider knee pads mandatory equipment. Lava is sharp.