LEGO Mountain Fortress 910029-1
LEGO Mountain Fortress (910029-1) is worth about $720 on the secondary market today, against a $380 retail price. It has 3,995 pieces, belongs to the BrickLink theme and was released in 2024. This set has retired — LEGO no longer produces it, so supply is fixed and prices are set entirely by the resale market.
- Set number
- 910029-1
- Theme
- BrickLink
- Subtheme
- Designer Program Series 1
- Year
- 2024
- Pieces
- 3,995
- Minifigures
- 9
- RRP
- $380
- Market value
- $720
- Used value
- $357
- Released
- 2024
- Retirement
- Retired
Minifigures in LEGO Mountain Fortress
- LEGO Black Falcon - Male, Pearl Dark Gray Detailed Legs, Helmet with Pointed Visor, Armor
- LEGO Mountain Fortress Black Falcon Archer - Female
- LEGO Mountain Fortress Black Falcon Archer - Male
- LEGO Mountain Fortress Black Falcon Soldier - Helmet with Broad Brim, Shoulder Armor
- LEGO Mountain Fortress Black Falcon Soldier - Helmet with Neck Protector, Beard
- LEGO Mountain Fortress Black Falcon Woman
- LEGO Mountain Fortress Child
- LEGO Mountain Fortress Lion Knights King
Mountain Fortress value by year
From $348 in 2021 to $650 in 2026 so far: +87%. Its highest year was 2026, at $650.
| Year | Value | Change |
|---|---|---|
| 2026 (so far) | $650 | +31.1% |
| 2025 | $496 | +46.1% |
| 2024 | $339 | −2.5% |
| 2023 | $348 | +0.0% |
| 2022 | $348 | +0.0% |
| 2021 | $348 | — |
Median of each year's market prices, sealed, in US dollars.
Frequently asked questions
How much is LEGO Mountain Fortress (910029-1) worth?
LEGO Mountain Fortress is worth approximately $720 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Mountain Fortress retired?
Yes — Mountain Fortress (910029-1) has been retired by LEGO and is no longer in production. Retired sets have fixed supply, which is why their prices are driven purely by the resale market.
Has LEGO Mountain Fortress gone up in value?
Yes. Mountain Fortress launched at $380 and now trades around $720, an increase of 89.5%. See the price history chart for how it got there.
What is the price per piece for Mountain Fortress?
At its $380 retail price across 3,995 pieces, Mountain Fortress works out to about $0.095 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Mountain Fortress a good investment?
Mountain Fortress currently trades 89.5% above its $380 retail price, and it is retired, so no new supply is entering the market. Past performance is not a prediction — condition, packaging and how long you hold all affect what a set actually sells for. BrickStats reports the numbers rather than giving investment advice.
Why is LEGO Mountain Fortress so expensive?
Mountain Fortress was released in 2024 and has since retired. Once LEGO stops producing a set, the only supply is what is already in circulation, so sealed copies in good condition compete for a shrinking pool of stock. That scarcity, not the parts, is what moves the price.