<PAGE>
WESTCORE TRUST
370 17th Street
Suite 3100
Denver, CO 80202
October 3, 1997
VIA EDGAR TRANSMISSION
- ----------------------
Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, N.W.
Washington, D.C. 20549
Re: Westcore Trust
(1933 Act Registration No. 2-75677)
(1940 Act Registration No. 811-3373)
------------------------------------
Ladies and Gentlemen:
On behalf of Westcore Trust (the "Trust") and pursuant to Rule
497(j) of the Securities Act of 1933 (the "1933 Act"), I hereby certify that
(i) the prospectuses and statement of additional information listed below
that would have been filed under paragraph (c) of Rule 497 of the 1933 Act
would not have differed from those prospectuses and statements of additional
information contained in the Trust's most recent post-effective amendment,
Post-Effective Amendment No. 46 to the Fund's Registration Statement on Form
N-1A under the Securities Act of 1933 and the Investment Company Act of 1940
("Post-Effective Amendment No. 46"), which was filed on September 26, 1997;
and (ii) the text of Post-Effective Amendment No. 46 has been filed
electronically:
1) The Prospectus dated October 1, 1997 for the MIDCO Growth Fund, Blue
Chip Fund, Growth and Income Fund, Small-Cap Opportunity Fund, Long-Term
Bond Fund, Intermediate-Term Bond Fund, and Colorado Tax-Exempt Fund;
2) The Stand-alone Prospectus dated October 1, 1997 for the MIDCO Growth
Fund; and
3) The Statement of Additional Information dated
<PAGE>
Securities and Exchange Commission
October 3, 1997
Page 2
October 1, 1997 for the MIDCO Growth Fund, Blue Chip Fund, Growth and
Income Fund, Small-Cap Opportunity Fund, Long-Term Bond Fund,
Intermediate-Term Bond Fund, and Colorado Tax-Exempt Fund;
If you have any questions or comments regarding this filing, do not hesitate
to contact Carrie B. Zehfuss, Esq. at (215) 988-2498.
Very truly yours,
Westcore Trust
By: /s/ Jasper R. Frontz
----------------------------
Jasper R. Frontz
Treasurer
