v3.26.3
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2026
Oct. 31, 2026
Document Information Line Items    
Entity Central Index Key 0002060717  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2026  
Document Fiscal Year Focus 2026  
Document Transition Report false  
Entity File Number 001-43064  
Entity Registrant Name VanEck Avalanche ETF  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 33-6867966  
Entity Address, Address Line One 666 Third Avenue  
Entity Address, Address Line Two 9th Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10017  
City Area Code 212  
Local Phone Number 293-2000  
Title of 12(b) Security Shares  
Trading Symbol VAVX  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   1,000,000
Amendment Flag false  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31