Challenges in California

Challenge Atlas · California

1. Digital check-in · History and America250 CA 175 Challenge September 9, 2025–September 8, 2026 · Sacramento, CA CA 175 Challenge is a digital check-in in Sacramento, California, with no upcoming dates listed.
2. Summit list · Hiking and summits Hundred Peaks Section Peak List Ongoing Sierra Club Angeles Chapter peakbagging list · Los Angeles, CA Hundred Peaks Section Peak List is a summit list in Los Angeles, California, with no upcoming dates listed.
3. Historic crawl · Arts and culture LRS Unseated Filming Tours (Los Angeles) Self-guided downloadable PDFs year-round · Los Angeles, CA LRS Unseated Filming Tours (Los Angeles) is a historic crawl in Los Angeles, California, with no upcoming dates listed.
4. Digital check-in · Parks Passport to Your California State Parks Ongoing OuterSpatial / CA State Parks app check-ins · Sacramento, CA Passport to Your California State Parks is a digital check-in in Sacramento, California, with no upcoming dates listed.
5. Stamp passport · Food and drink San Diego PintLife Passport 2026 Calendar year 2026 · San Diego, CA San Diego PintLife Passport 2026 is a stamp passport in San Diego, California, with no upcoming dates listed.
6. Stamp passport · Food and drink SLO CAL Wine Passport 2026 January 1–December 31, 2026 · San Luis Obispo, CA SLO CAL Wine Passport 2026 is a stamp passport in San Luis Obispo, California, with no upcoming dates listed.
7. Digital check-in · Lighthouses and maritime The Lighthouse Circuit California Passport Ongoing location-verified digital stamps; Flagship 12 subset · Statewide Coast, CA The Lighthouse Circuit California Passport is a digital check-in in Statewide Coast, California, with no upcoming dates listed.
8. Stamp passport · History and America250 Mother Road Route 66 Passport 2025/2026 sixth edition multi-state stamp book · Nationwide Mother Road Route 66 Passport is a stamp passport in nationwide, with no upcoming dates listed.

Nationwide programs

1. Scavenger hunt · Geocaching and letterboxing Atlas Quest Letterboxing Year-round, individual boxes vary · Nationwide Atlas Quest Letterboxing is a scavenger hunt in nationwide, with no upcoming dates listed.
2. Geocache trail · Geocaching and letterboxing Geocaching Adventure Lab Year-round; individual adventures vary · Nationwide Geocaching Adventure Lab is a geocache trail in nationwide, with no upcoming dates listed.
3. Mileage goal · Hiking and summits North Country Trail Hike 100 Annual miles challenge, 2026 · Nationwide North Country Trail Hike 100 is a mileage goal in nationwide, with no upcoming dates listed.
4. Stamp passport · Parks Passport to Your National Parks Year-round, subject to site and visitor center hours · Nationwide Passport to Your National Parks is a stamp passport in nationwide, with no upcoming dates listed.
5. Stamp passport · Lighthouses and maritime Children’s Lighthouse Passport Pacific Northwest Ongoing USLHS kids passport for Oregon and Washington lights · Nationwide Children’s Lighthouse Passport Pacific Northwest is a stamp passport in nationwide, with no upcoming dates listed.
6. Stamp passport · History and America250 Mother Road Route 66 Passport 2025/2026 sixth edition multi-state stamp book · Nationwide Mother Road Route 66 Passport is a stamp passport in nationwide, with no upcoming dates listed.
7. Stamp passport · Lighthouses and maritime U.S. Lighthouse Society Passport Program Ongoing; many stamp sites seasonal. Michigan leads with roughly 112 stations. · Nationwide U.S. Lighthouse Society Passport Program is a stamp passport in nationwide, with no upcoming dates listed.