The Bureau of Land Management Barstow Field Office has implemented a much more convenient way to purchase your Dumont Dunes pass. You can now go to Recreation.gov and get your pass online before you even head out for the season. The fees will remain the same. There is a small service fee (which looks like $2.50) but the total still comes to the same for the pass. As of right now it appears only weekly passes are available on the website, but that may change since they list annual pass options, just not at checkout. Let's wait and see after September 2023 which is when the annual passes become available. Maybe that option will appear online as well.
Link to Recreation.gov Dumont pass page:
Dumont Dune Annual pass season is Oct. 1-Sept. 30
Weekly passes are $30
Non-holiday annual pass is $90
The annual pass that includes holiday weekends is $120
The holiday weeks are:
Halloween: Oct. 25 - Oct. 31, 2022
Thanksgiving: Nov. 22 - 28, 2022
New Year's: Dec. 27, 2022 to Jan. 2, 2023
Martin Luther King Jr.: Jan. 10-16, 2023
President's Day: Feb. 14-20, 2023
More pass information on our passes page.
BLM press release