USAJMO

29 problems here, rated 5.8 to 7.6 on our scale (AIME, harder to National Olympiad, round 2).

Algebra 10Combinatorics 5Geometry 6Number theory 8

#	Topic	Diff	Type	Year
1	Combinatorics	5.8	answer	—	open
2	Number theory	6.2	answer	—	open
3	Combinatorics	6.2	answer	—	open
4	Geometry	6.4	answer	—	open
5	Number theory	6.6	answer	—	open
6	Number theory	6.7	answer	—	open
7	Number theory	6.7	answer	—	open
8	Number theory	6.8	answer	—	open
9	Algebra	6.8	answer	—	open
10	Geometry	6.8	answer	—	open
11	Number theory	6.8	answer	—	open
12	Combinatorics	6.9	answer	—	open
13	Number theory	7.0	answer	—	open
14	Geometry	7.0	answer	—	open
15	Number theory	7.1	answer	—	open
16	Algebra	7.1	answer	—	open
17	Geometry	7.1	answer	—	open
18	Algebra	7.2	answer	—	open
19	Algebra	7.2	answer	—	open
20	Geometry	7.2	answer	—	open
21	Algebra	7.3	answer	—	open
22	Combinatorics	7.4	answer	—	open
23	Combinatorics	7.4	answer	—	open
24	Algebra	7.4	answer	—	open
25	Algebra	7.4	answer	—	open
26	Algebra	7.5	answer	—	open
27	Algebra	7.5	answer	—	open
28	Geometry	7.5	answer	—	open
29	Algebra	7.6	answer	—	open

These are sorted by difficulty within the competition, but they aren't a course. The track is the route through, drawn from all the sources at once.