Rockhounding at the Mineral Mountains (Rock Corral), Utah
ALLOWED
No permit required
Key Conditions
- No permit required for personal-use collecting at Rock Corral Recreation Area, the BLM's own named rockhounding site in the range
- Daily limit: 25 lb plus one piece per person under 43 CFR § 8365.1-5(b)(2); 250 lb/year maximum
- Hand tools only — no motorized digging or rock-cutting equipment for casual collection
- Ground within a few miles of Roosevelt Hot Springs and the Blundell Geothermal Plant sits inside active BLM geothermal exploration leases — call Cedar City Field Office at (435) 865-3000 to confirm current lease boundaries before collecting there
- No fee to enter or collect; the day-use area has restrooms, picnic shelters, and a separate primitive camping area
Roosevelt Hot Springs Is Inside an Active Geothermal Lease Zone
The Mineral Mountains host Utah's hottest geothermal system, and the ground around Roosevelt Hot Springs and the Blundell Geothermal Plant — a few miles north of Rock Corral — has been under active BLM geothermal exploration lease since at least 2016, when Ormat leased the surrounding federal parcels. BLM added further lease sales covering tens of thousands of acres in the region as recently as 2024–2025. BLM's own rockhounding policy states collecting is generally not permitted where mineral rights are leased or privately held. Rock Corral itself, several miles south on the range's opposite slope, isn't inside these lease parcels — but anyone tempted to chase the Milford obsidian deposits closer to the geothermal field should call Cedar City FO at (435) 865-3000 first.
The Mineral Mountains are the largest exposed mass of solidified molten rock in Utah — a granite batholith that pushed up and cooled between roughly 25 million and 600,000 years ago, young enough that the range still vents heat through Roosevelt Hot Springs on its western flank. As the granite cooled, late-stage pegmatite fluids rich in silica filled shrinkage cracks and gas cavities, crystallizing into the vugs that collectors now split open at Rock Corral: smoky quartz points up to three inches long alongside blocky microcline feldspar crystals.
BLM named the site Rock Corral for a reason — it's one of the only spots in the range with a developed day-use pad, and the crystal-bearing vugs cluster within about half a mile of the picnic tables, not scattered across the whole 30-mile range. That concentration is what makes it a workable destination rather than a needle-in-a-haystack search across an entire mountain range.
- No permit required for personal-use collecting up to 25 lb/day plus one piece
- 250 lb/year personal-use maximum
- Hand tools only — no motorized digging or cutting equipment
- Collecting restricted within active mining claims and geothermal lease parcels; verify status before working ground near Roosevelt Hot Springs
- Commercial collection requires separate BLM mineral materials authorization
Source: BLM Cedar City Field Office, (435) 865-3000; 43 CFR § 8365.1-5(b)(2)
Utah's First Commercial Geothermal Plant Sits Right Here
The Blundell Geothermal Power Plant, on an alluvial fan at the western foot of the Mineral Mountains, began commercial operation in 1984 as Utah's first geothermal power plant — drawing on the same magmatic heat source that makes Roosevelt Hot Springs the hottest geothermal system in the state. The plant is owned and operated by PacifiCorp; the surrounding federal land has since drawn repeated BLM geothermal lease sales as exploration expanded. It's a working industrial site, not a rockhounding destination, but its presence is the reason casual collectors need to check lease boundaries before working ground in that specific part of the range.
Getting to Rock Corral
Directions and facilities per BLM.gov's official Rock Corral site page, verified August 2026.
Mineral Mountains vs. Other BLM Utah Rockhound Sites
| Site | Managing Office | Target Material | Daily Limit | Access |
|---|---|---|---|---|
| Rock Corral (Mineral Mountains) | Cedar City FO / Color Country District | Smoky quartz, microcline feldspar | 25 lb | Improved gravel to Pass Road; final stretch unimproved |
| Topaz Mountain | Fillmore FO | Topaz (7.5 lb special limit), other minerals | 7.5 lb topaz / 25 lb other | Unpaved BLM road; 2WD in dry conditions |
| Dugway Geode Beds | Fillmore FO | Hollow quartz/calcite/selenite geodes | 25 lb | 50 mi of Pony Express Road; remote |
Verified against BLM.gov office and site pages, August 2026.
Best Times to Visit the Mineral Mountains
Spring (Apr–May)
GoodMild temperatures at the range's mid-elevation west slope; snowmelt can leave the unimproved final stretch of Rock Corral Road soft in early April.
Summer (Jun–Aug)
FairHot in the surrounding Milford Valley, though the Mineral Mountains' elevation moderates it somewhat compared to lower desert BLM sites. Afternoon thunderstorms are common in the high desert monsoon window.
Fall (Sep–Oct)
GoodThe most reliable weather window — stable roads, comfortable digging temperatures, and fewer visitors than spring.
Winter (Nov–Mar)
PoorSnow at this elevation can close the unimproved approach road entirely; call Cedar City FO to check conditions before a winter visit.
Recommended Gear for Rock Corral
- RequiredRock hammer and cold chisel— Standard tools for working open the granite vugs where quartz and feldspar crystals form.
- OptionalHand lens (10x)— Useful for telling quartz termination faces from feldspar cleavage planes before committing to extract a specimen.
- RequiredGloves and eye protection— Granite fractures unpredictably; vug interiors can have sharp crystal edges.
- OptionalHigh-clearance vehicle— Helpful but not strictly necessary — the final unimproved stretch is passable to standard cars in dry conditions.
- OptionalPadded specimen boxes— Crystal terminations chip easily on the drive out over the gravel access road.
Permits & Licenses
| Permit | Required? | Notes |
|---|---|---|
| Personal-use collecting | No | No permit required for non-commercial personal use up to 25 lb/day at Rock Corral or elsewhere on open BLM land in the range. Commercial collection requires a separate BLM mineral materials authorization — contact Cedar City Field Office at (435) 865-3000. |
| Collecting within active geothermal lease boundaries | Yes | BLM's general rockhounding policy states collecting is 'generally not allowed' on land where mineral rights are leased or privately held. Roosevelt Hot Springs and the land immediately around the Blundell Plant have been under active geothermal exploration leases since at least 2016, with additional lease sales as recently as 2024–2025. Confirm current boundaries with Cedar City FO before collecting anywhere near the plant. |
Time & Seasonal Restrictions
- 25 lb/day/person limit under 43 CFR § 8365.1-5(b)(2); 250 lb/year maximum
- Hand tools only; no explosives, power tools, or heavy equipment for casual collecting
- No commercial collection without a separate BLM mineral materials authorization
- Collecting is restricted or excluded within active mining claims and geothermal lease parcels — this applies specifically to ground within a few miles of Roosevelt Hot Springs and the Blundell Geothermal Plant, not to Rock Corral itself on the range's opposite west-slope canyon
- No collecting inside the Rock Corral day-use facility footprint itself (picnic tables, restroom pads) — work the surrounding talus and outcrops, not the developed pad
Equipment Notes
- Rock hammer and cold chisel — smoky quartz and microcline crystals sit in vugs within granite; extraction typically means working a cavity open along existing fractures, not blasting fresh rock
- Hand lens or loupe (10x) — helpful for distinguishing clear-to-smoky quartz termination faces from broken feldspar cleavage in the field before deciding what to extract
- Sturdy gloves and eye protection — granite fractures unpredictably and vug walls can carry sharp crystal edges
- High-clearance vehicle recommended for the unimproved final stretch of Pass Road / Upper Ranch Canyon Road, though it is passable to standard cars in dry conditions
What People Find Here
- Smoky quartz crystals up to 3 inches long — the signature find at Rock Corral, formed as euhedral (well-formed) points in granite vugs
- Microcline feldspar crystals averaging about 0.75 inches — commonly found alongside smoky quartz in the same cavities
- Clear to lightly smoky quartz — less dramatic than the darker material but more abundant overall
- Obsidian (Milford obsidian, chrisobalite-bearing) — associated with the Roosevelt Hot Springs Mining District further north in the range, distinct from the granite-hosted quartz at Rock Corral
- Historic mining district tailings material (pyrite, malachite) near Minersville, at the range's southwest base — a byproduct of 19th- and 20th-century base-metal mining, not a Rock Corral find
Penalties for Violations
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| Violation | Statute | Penalty |
|---|---|---|
| Exceeding the 25 lb/day personal-use limit | 43 CFR § 8365.1-5(b)(2) | Treated as commercial collection without authorization; federal citation and potential forfeiture of collected material |
| Collecting within an active geothermal lease or mining claim without the leaseholder's consent | 43 CFR Part 3200 (geothermal leasing); 43 CFR Part 3800 (mining claims) | Civil trespass exposure against the leaseholder's surface rights; BLM citation for unauthorized surface disturbance on encumbered federal land |
| Commercial collection without BLM authorization | 43 CFR § 3602.10 | Federal citation; fine; potential criminal referral for significant quantities |
Etiquette & Leave No Trace
- Collect from talus and loose float around known vug zones rather than prying open intact rock faces — it's both more productive and less damaging to the outcrop for the next visitor
- Leave the picnic shelters and fire pits at Rock Corral clear of tailings and broken rock from cracking specimens open
- Pack out all trash — there is no regular cleanup service at this remote day-use site
- If you're unsure whether a spot near Roosevelt Hot Springs sits inside a lease boundary, treat it as off-limits until Cedar City FO confirms otherwise rather than guessing
- Fill any hand-dug holes in loose talus before leaving; erosion on the range's granite slopes is already a management concern noted by BLM
Nearby Alternatives
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| Site | Distance | Notes |
|---|---|---|
| Topaz Mountain (BLM, Utah) | 110 mi | Managed by BLM Fillmore FO rather than Cedar City FO/Color Country District. Special 7.5 lb/day topaz limit vs. the standard 25 lb/day here. A better-documented, more heavily visited BLM rockhounding destination for comparison. |
| Dugway Geode Beds (BLM, Utah) | 140 mi | Same Fillmore FO jurisdiction as Topaz Mountain, different target material (hollow geodes vs. granite-vug crystals) and a longer, more remote access drive. |
Frequently Asked Questions
Do I need a permit to collect at Rock Corral in the Mineral Mountains?
No. Rock Corral Recreation Area is BLM land in the Cedar City Field Office/Color Country District, and standard BLM personal-use rules apply: 25 lb/day plus one piece, no permit, hand tools only. It's one of the few Utah rockhounding sites the BLM names directly as a rockhounding destination on its own recreation site page.
Can I collect obsidian near Roosevelt Hot Springs or the Blundell Geothermal Plant?
Check with the BLM Cedar City Field Office before you go. That area, a few miles north of Rock Corral, has been under active geothermal exploration leases since at least 2016, with additional BLM lease sales as recently as 2024–2025 covering tens of thousands of acres in the region. BLM's general policy treats casual collecting as generally not allowed where mineral rights are leased, so the open-collecting rules that apply at Rock Corral don't necessarily extend to ground near the plant.
What will I actually find at Rock Corral?
Smoky quartz crystals up to about 3 inches, often with microcline feldspar crystals averaging around 0.75 inches, both formed in vugs within the granite. The best-developed crystal specimens are documented within roughly a half-mile radius of the day-use picnic area, though the material isn't confined to that exact spot.
Is camping allowed at Rock Corral?
Yes. A separate primitive camping area sits past the fork that splits from the day-use road, with no hookups or potable water. The day-use area itself has restrooms and sheltered picnic tables but is not a camping zone.
How does Rock Corral compare to Topaz Mountain, Utah's better-known BLM rockhounding site?
Topaz Mountain, about 110 miles north, is managed by a different office (BLM Fillmore FO vs. Cedar City FO here) and targets a specific mineral — topaz — under a special 7.5 lb/day limit tighter than the standard 25 lb/day that applies at Rock Corral. Rock Corral is less documented in rockhounding literature but has an advantage Topaz Mountain doesn't: developed day-use facilities (restrooms, picnic shelters) at the collecting site itself.
What tools do I need for the granite at Rock Corral?
A rock hammer and cold chisel are the standard tools — smoky quartz and feldspar crystals sit inside vugs (gas-cavity pockets) in the granite, and extraction generally means working an existing fracture or cavity open rather than breaking fresh rock. No powered rock saws or drills are permitted for casual personal-use collecting.
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
- BLM — Rock Corral Recreation Area Official Site Page(accessed 2026-08-03)
- BLM — Rockhounding: Rocks, Minerals and Gemstones on Public Lands(accessed 2026-08-03)
- Utah Geological Survey — Roosevelt Hot Springs Geothermal Area GeoSights(accessed 2026-08-03)
- BLM Utah — Cedar City Field Office(accessed 2026-08-03)
- BLM Press Release — Geothermal Leases in Utah Sale Nets Over $5.6 Million(accessed 2026-08-03)
Last verified: 2026-08-03 · Last updated: 2026-08-03