Rockhounding at Bisti/De-Na-Zin Wilderness, New Mexico
PROHIBITED
Not permitted at this location
Key Conditions
- Petrified wood — the material most visitors come to look for — cannot be collected anywhere in the wilderness; BLM's own visitor page states this is banned under the site's Wilderness Management Plan, separate from and stricter than the standard BLM casual-use rule
- Vertebrate fossils and cultural objects cannot be disturbed or removed without a federal research permit, which is not something a recreational visitor can obtain
- No published BLM guidance confirms that ordinary rock and mineral collecting (unrelated to petrified wood or fossils) is allowed inside the wilderness boundary either — treat the whole 45,000 acres as look-but-don't-take unless Farmington Field Office tells you otherwise for a specific material
- No permit is required simply to hike, photograph, or camp — the collecting restriction is what's unusual here, not general access
The wilderness's signature material is off-limits
BLM Farmington Field Office's own visitor guidance for this wilderness states plainly that petrified wood collection is prohibited under the site's Wilderness Management Plan. That's a stricter, site-specific rule layered on top of the standard BLM casual-use collecting allowance found elsewhere on public land in New Mexico — and it targets exactly the material that draws most visitors to a badlands full of fossilized logs. Vertebrate fossils and cultural objects are separately off-limits everywhere on BLM land without a research permit, which a recreational visitor won't be issued.
The badlands here formed from roughly 70-million-year-old sediment — interbedded sandstone, shale, mudstone, and thin coal seams laid down near the edge of an ancient inland sea. Wind and rain have since carved that soft rock into hoodoos, cap-rock pinnacles, and the odd mushroom-shaped balanced boulders that make the terrain photograph so well and erode so easily underfoot.
Congress designated the area Wilderness on October 30, 1984 under the New Mexico Wilderness Act (Public Law 98-603), combining the Bisti and De-Na-Zin units into roughly 45,000 protected acres. "Bisti" comes from the Navajo for a large area of shale hills; "De-Na-Zin" comes from the Navajo word for cranes, referencing petroglyphs found in the area. The Wilderness designation is the reason nothing here can be collected the way it can on ordinary BLM ground a few miles outside the boundary — motorized travel, mechanical equipment, and (per the site's own management plan) petrified wood removal are all off the table specifically because this is Wilderness, not standard multiple-use public land.
- Petrified wood collecting is prohibited throughout the wilderness
- Vertebrate fossils and cultural/archaeological objects cannot be disturbed or removed without a research permit
- No motorized or mechanical travel, including bicycles
- No drones
- Group size limited to 8 people
- No campfires; dispersed camping capped at 14 days
- No climbing on or damaging hoodoos and other geologic features
Source: BLM Farmington Field Office
Getting There
Road and facility details confirmed against BLM's visitor page, August 2026.
When to Go
Spring (Mar–May)
GoodMild daytime temperatures and generally the driest stretch for road access, though a wet spring storm can still shut the clay roads down for a day or two.
Summer (Jun–Aug)
PoorNew Mexico's monsoon season brings sudden afternoon thunderstorms that flood the arroyos and turn the access roads to impassable mud with little warning; daytime heat on the shadeless badlands surface is also severe.
Fall (Sep–Oct)
GoodThe most reliable window — cooler temperatures, lower storm frequency than summer, and roads that have usually dried out from monsoon damage.
Winter (Nov–Feb)
FairCold but usually dry and accessible; a snow or ice event on the clay roads is more disruptive here than the snowfall amount would suggest, since the surface stays slick long after the snow itself has melted.
Bisti/De-Na-Zin at a Glance
~45,000
Wilderness acreage
Oct. 30, 1984
Designated
Prohibited
Petrified wood collecting
No
Entry permit?
8
Max group size
Bisti/De-Na-Zin vs. Other New Mexico Rockhounding Options
| Location | Collecting allowed? | Managing agency | Notes |
|---|---|---|---|
| Bisti/De-Na-Zin Wilderness | No (petrified wood/fossils) | BLM Farmington FO | Wilderness Management Plan bans petrified wood; other material status unpublished |
| Ah-Shi-Sle-Pah Wilderness | Unclear | BLM Farmington FO | Smaller (7,242 ac), similar terrain, 2019 designation; no published petrified-wood-specific rule found |
| Rockhound State Park, NM | Yes — 15 lb/person/day | NM State Parks | ~180 mi south; a designed-for-collecting state park, the functional opposite of this site |
| Ordinary BLM land (non-Wilderness), NM | Yes — standard casual-use limits | BLM (district-dependent) | 43 CFR § 8365.1-5(b)(2) allows limited personal-use collecting outside Wilderness and claimed ground |
Status confirmed against each agency's own published guidance, August 2026. Always verify current rules directly before a trip.
Before You Go — Bisti/De-Na-Zin
- Check the 3-day rain and snow forecast for the access road corridor, not just the trip day itself
- Download an offline map or GPS track — the interior is unmarked and trail-less
- Pack at least 1 gallon of water per person; none is available on site
- Leave a trip plan with someone — cell service is unreliable to nonexistent
- Bring a camera instead of a collecting bag — nothing here legally comes home with you
- Confirm current fire restrictions and group-size rules with Farmington FO if planning to camp
Permits & Licenses
| Permit | Required? | Notes |
|---|---|---|
| Day hiking / general visitation | No | No permit is needed to enter, hike, photograph, or camp in the wilderness. |
| Vertebrate fossil or cultural object collection | Yes | Only issued for professional/institutional research purposes. Not obtainable by, or intended for, recreational visitors — treat vertebrate fossils and cultural material as strictly hands-off. |
| Hunting | Yes | A valid New Mexico Department of Game and Fish hunting license is required if hunting within the wilderness; unrelated to rockhounding access. |
Time & Seasonal Restrictions
- Petrified wood collecting prohibited wilderness-wide under the Bisti/De-Na-Zin Wilderness Management Plan
- No motorized or mechanical travel of any kind, including bicycles — a Wilderness Act baseline rule
- No drones
- Group size capped at 8 people
- No campfires anywhere in the wilderness
- Camping limited to 14 days
- No climbing on or otherwise damaging the hoodoo formations
- Access roads to both trailheads are unpaved and routinely become slick clay or impassable after rain or snow — this is a practical access restriction as much as a legal one
Equipment Notes
- High-clearance vehicle for the unpaved approach roads — Farmington Field Office specifically recommends this rather than a standard sedan
- Offline GPS app or downloaded topo map — the interior is trail-less and unmarked, and cell service is minimal to nonexistent
- At least 1 gallon of water per person — no water source exists anywhere in the wilderness
- Sturdy, ankle-supporting footwear — the clay and rock surfaces are uneven and slick when even slightly damp
- No collecting bag needed — there is nothing here you can legally bring home besides photographs
What People Find Here
- Petrified log sections and fragments, visible eroding from the Kirtland and Fruitland Formation badlands — look, photograph, do not remove
- Hoodoo and cap-rock formations in sandstone, shale, mudstone, and coal — the site's defining visual feature, not a collectible material
- Occasional vertebrate bone or tooth fragments reported eroding from the same Cretaceous formations that have produced named dinosaur discoveries elsewhere in the San Juan Basin — report sightings to Farmington Field Office rather than touching or collecting
Penalties for Violations
← Scroll to see all columns
| Violation | Statute | Penalty |
|---|---|---|
| Removing petrified wood, fossils, or other geological/cultural material from the wilderness | 43 CFR § 8360.0-7 | Fine up to $1,000 and/or imprisonment up to 12 months for a first offense under general BLM visitor-services regulations |
| Disturbing or removing vertebrate fossils or cultural/archaeological objects | Archaeological Resources Protection Act, 16 U.S.C. § 470ee | Federal misdemeanor to felony depending on the value and nature of the material; can include significant fines and imprisonment for repeat or high-value violations |
| Operating a motorized or mechanical vehicle (including bicycles) within the wilderness boundary | Wilderness Act of 1964, 16 U.S.C. § 1133(c) | Federal citation; equipment may be subject to seizure |
Etiquette & Leave No Trace
- Leave every piece of petrified wood exactly where you found it, no matter how small or how common it looks lying on the surface
- Stay off the hoodoos themselves — the cap rock that gives them their shape erodes and breaks under foot traffic and cannot regrow
- Pack out all trash, including anything you find left by previous visitors
- Keep groups to 8 or fewer and stay on existing informal routes rather than braiding new paths across the clay surface
- Turn back if the access road is wet — getting a vehicle stuck on the unmaintained clay roads here is a well-documented and genuinely dangerous problem, not just an inconvenience
Frequently Asked Questions
Can I collect petrified wood at Bisti/De-Na-Zin Wilderness?
No. BLM's own visitor guidance for this wilderness states that petrified wood collecting is prohibited under the site's Wilderness Management Plan. This is stricter than the standard BLM casual-use rule that allows limited petrified wood collecting on ordinary BLM land elsewhere in New Mexico, and it applies to every piece in the wilderness, including small surface fragments.
Do I need a permit just to hike or photograph here?
No. General visitation — hiking, photography, primitive camping up to 14 days — requires no permit. Permits only come into play if you wanted to collect vertebrate fossils or cultural objects for research, which isn't something available to recreational visitors.
Is any rockhounding allowed here at all?
Not with confidence. BLM's published material bans petrified wood and vertebrate fossils outright but doesn't clearly state whether ordinary, non-fossil rock and mineral collecting is separately permitted inside the wilderness boundary the way it is on regular BLM land. Given that gap, treat the entire 45,000 acres as a look-but-don't-take site and call the Farmington Field Office at (505) 564-7600 before assuming any specific material can be collected.
What's the difference between this wilderness and the nearby Ah-Shi-Sle-Pah Wilderness?
Ah-Shi-Sle-Pah is a separate, smaller (7,242-acre) badlands wilderness about 20 miles northeast, also managed by BLM Farmington Field Office, designated in 2019 rather than 1984. It has similar hoodoo terrain and the same general Wilderness Act restrictions on motorized travel and mechanical equipment, but its published guidance doesn't spell out a petrified-wood-specific ban the way Bisti/De-Na-Zin's does — don't assume the exact same collecting rule carries over without checking.
Why do the access roads close or become impassable?
Both County Road 7297 (to the Bisti trailhead) and County Road 7500 (to the De-Na-Zin trailhead) are unpaved and cross clay-heavy soil that turns into deep, sticky mud after rain or snowmelt. Vehicles routinely get stuck for hours in these conditions. Check the forecast for the two or three days before your trip, not just the day of, since the roads can stay soft after rain has already stopped.
What happens if I get caught taking a piece of petrified wood?
You're subject to a federal citation under BLM's general visitor-services penalty rule, 43 CFR § 8360.0-7 — a fine of up to $1,000 and/or up to 12 months imprisonment for a first offense. Vertebrate fossil or artifact removal carries separate, potentially steeper penalties under the Archaeological Resources Protection Act.
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Disclaimer
Information is provided for general guidance only. Regulations change frequently. Always verify current rules with the official jurisdiction before relying on this information for legal decisions. Permitted Pursuits is not a substitute for official agency guidance. Report an error.
Sources
- Bisti/De-Na-Zin Wilderness Area — BLM Visit Page(accessed 2026-08-31)
- Bisti/De-Na-Zin Wilderness Area — BLM National Conservation Lands (New Mexico)(accessed 2026-08-31)
- 43 CFR § 8360.0-7 — Penalties (eCFR)(accessed 2026-08-31)
- Ah-Shi-Sle-Pah Wilderness — BLM Visit Page(accessed 2026-08-31)
Last verified: 2026-08-31 · Last updated: 2026-08-31