| Race schedule — April, 1998 |
| Sun |
Mon |
Tue |
Wed |
Thu |
Fri |
Sat |
12
|
13
|
14
|
15
|
16
|
17
|
18
|
| Race schedule — May, 1998 |
|
|
|
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
31
|
|
|
|
|
|
|
|
| Color |
Notes |
| Green |
Practice |
| Dark Blue |
Time trials |
| Silver |
Race day |
| Red |
Rained out |
| Blank |
No track activity |
*
|
|