Multi-day through multi-week, mostly road and gravel bike routes!

Northern Summer
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Washington, USA: North Cascades and Yakama loop

Loads of routes in the USA; see [Adventure Cycling Association][aca]. Notably:

- "Sierra Cascades": parallel to the pacific crest trail, on bike
- Pacific Coast itself
- Route 66 (at least the western subset); Santa Monica
- Western Express: SF to Pueblo, Colorado; ~1600 miles, a month or so.
- Southern Tier: San Diego throuhg El Paso; route continues cross-country
- Great Parks North: Montana inot Canada (Banff, Jasper)
- Utah Cliffs: short (300 mile) loop aroun dZion.

[aca]: https://www.adventurecycling.org/routes-and-maps/adventure-cycling-route-network/

Iran: paved roads?

Scandanavia: routes on the "EuroVelo" network

Northern Winter
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Tasmania: paved roads?

Patagonia/Chile/Argentina: Carretera Austral; ~500 miles, roughly 10 days; or
770 miles in full; gravel road. Very popular with cyclists.

- https://medium.com/get-there/carretera-austral-cycling-guide-covering-650-km-of-deserted-road-in-two-to-three-weeks-69953e85faf9
- http://www.thebikeramble.com/2017/01/carretera-austral/