Can't load (external) Boost library into project - c++

Question

I am using CMAKE to try to load Boost library into my project. (I'm using CLion as IDE). Here is my CMAKE file:
cmake_minimum_required(VERSION 3.14)
project(untitled2)
set(Boost_USE_STATIC_LIBS ON) # only find static libs
set(Boost_USE_MULTITHREADED ON)
set(Boost_USE_STATIC_RUNTIME OFF)
set(Boost_INCLUDE_DIR C/Users/User/Downloads/boost_1_68_0/boost_1_68_0/libs)
find_package(Boost 1.68.0 COMPONENTS system filesystem REQUIRED)
if(Boost_FOUND)
include_directories(${Boost_INCLUDE_DIRS})
target_link_libraries(untitled2 ${Boost_LIBRARIES})
endif()
add_executable(untitled2 main.cpp)
set(CMAKE_CXX_STANDARD 14)
Here is my directory (C/Users/User/Downloads/boost_1_68_0/boost_1_68_0/):
When reloading CMAKE file I get this error:
CMake Error at C:/Program Files/JetBrains/CLion 2019.1.4/bin/cmake/win/share/cmake-3.14/Modules/FindBoost.cmake:1388 (file):
file STRINGS file
"C:/Users/User/CLionProjects/untitled2/C/Users/User/Downloads/boost_1_68_0/boost_1_68_0/libs/boost/version.hpp"
cannot be read.
Call Stack (most recent call first):
CMakeLists.txt:8 (find_package)
CMake Error at C:/Program Files/JetBrains/CLion 2019.1.4/bin/cmake/win/share/cmake-3.14/Modules/FindBoost.cmake:2147 (message):
Unable to find the requested Boost libraries.
Boost version: 0.0.0
Boost include path: C/Users/User/Downloads/boost_1_68_0/boost_1_68_0/libs
Detected version of Boost is too old. Requested version was 1.68 (or
newer).
Call Stack (most recent call first):
CMakeLists.txt:8 (find_package)
-- Configuring incomplete, errors occurred!
See also "C:/Users/User/CLionProjects/untitled2/cmake-build-debug/CMakeFiles/CMakeOutput.log".
[Failed to reload]
Any suggestions why it fails??