4 days in Iceland

Our Iceland visit (not including a few additional times when we were just transferring onto connecting flights) was in April 2015, so no bicycles, although we did some trekking and glacier travel with a guide.

We’ve done self-supported bike tours in the USA, and in Austria, France, Belgium, and Ireland. Outside of the USA, we rented bikes, but had our own panniers. Are you planning on 2 days out and 2 days back, or a 4 day loop, or a 4 day route ending in a different place than you started? And are you thinking about biking to a trailhead, then trekking on foot from there for a bit, then riding onward? And using road bikes or off-pavement mountain bikes? All biking/trekking, all the time, for those 4 days, with no other activities?

I may not have direct Iceland bike/trek/backpack experiences to relate, but if others have done what you’re asking about, providing them a bit more about what you have in mind might help get more explicit responses. Hope you have a great 4 days.

Really open to all suggestions. Biking and trekking apart, we would like to enjoy what Iceland can offer. So, it can be a 1day tour, a 1day trekking and then other activities following suggestions... :-) thx a lot for your help.

so. many. options.

i highly recommend this company--
http://geotravel.is

i took their full day super jeep trip to askja. have a read if you'd like--
https://noguidebooks.com/iceland-askja/

The Blue Lagoon is a popular place to soak, in the runoff water from a giant power plant. We opted, instead, for the Laugarvatn Fontana baths, with natural saunas, and pools of varying degrees of hotness. You can take a dip in the icy lake water alongside the baths, then rinse off and hop into a hot pool. Both invigorating and ultimately relaxing.

We signed up for a tour that included a bus ride from Reykjavik to Fontana, a good soak, and a buffet dinner. The tour was also supposed to extend until midnight for Northern Lights viewing (it was April so the Lights had a chance of being seen) but heavy overcast clouds cut that part of the tour out of the itinerary and we got back to our hotel early that night.

There was also a see-Reykjavik-by-bicycle guided tour, but the morning we planned to do it was cold and drizzly so we skipped getting soaked on bikes, and did our own tour on foot.

thanks a lot!