If driving around Lagarfljót, your best lunch option is the cafe at Skriðuklaustur, which doesn't require museum admission. A fabulous, homemade, all-you-can-eat lunch buffet is served until 2pm, costing only 1,650kr ($26/£13) for adults, 850kr ($14/£7) for children 6 to 12. A cake buffet from 2pm to museum closing time costs 1,200kr ($19/£10) adults/600kr ($10/£5) kids. In Hallormsstaðaskógur, the Fosshótel Hallormsstaður off Route 931 has a summer-only restaurant, and the Shell gas station has seating space and serves burgers, pizzas, and sandwiches. Kárahnjúkar Dam has a small cafe open from 11am to 8pm daily, but serves only drinks, candy, and packaged sandwiches. For Snæfell, all food must be brought in.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.