Simin Lee

Bib: 18184F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 25550
Top 33%
Gender (Female)
#0 / 10924
Top 18%
Division (F18-39)
#0 / 4660
Top 31%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:22
Rank: #10956
Start5K
7:31/mi
23:22 split
10K· 6.21 mi
47:32
Rank: #11648 (-692)
5K10K
7:47/mi
24:10 split
15K· 9.32 mi
1:11:52
Rank: #11818 (-170)
10K15K
7:50/mi
24:20 split
20K· 12.43 mi
1:36:26
Rank: #11600 (+218)
15K20K
7:54/mi
24:34 split
Half· 13.11 mi
1:41:50
Rank: #11619 (-19)
20KHalf
7:55/mi
5:24 split
25K· 15.53 mi
2:01:13
Rank: #11301 (+318)
Half25K
8:00/mi
19:23 split
30K· 18.64 mi
2:26:46
Rank: #10768 (+533)
25K30K
8:13/mi
25:33 split
20M
2:37:51
Rank: #10448 (+320)
30K20M
8:09/mi
11:05 split
21M
2:46:14
Rank: #10063 (+385)
20M21M
8:23/mi
8:23 split
35K· 21.75 mi
2:52:09
Rank: #9911 (+152)
21M35K
7:55/mi
5:55 split
23M
3:01:58
Rank: #9495 (+416)
35K23M
7:50/mi
9:49 split
24M
3:09:35
Rank: #9202 (+293)
23M24M
7:37/mi
7:37 split
40K· 24.85 mi
3:16:06
Rank: #8914 (+288)
24M40K
7:37/mi
6:31 split
25.2M
3:18:55
Rank: #8745 (+169)
40K25.2M
8:10/mi
2:49 split
Finish· 26.22 mi
3:26:12
Rank: #8459 (+286)
25.2MFinish
7:09/mi
7:17 split

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:50
Pace7:46 /mi
2nd Half
Distance13.11 mi
Time1:44:22
Pace7:58 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:0723:227:3123:22
7:31
-
10K
6.21 mi11:39:1747:327:3924:10
7:47
+0:16
15K
9.32 mi12:03:371:11:527:4324:20
7:50
+0:03
20K
12.43 mi12:28:111:36:267:4624:34
7:54
+0:04
Half
13.11 mi12:33:351:41:507:465:24
7:55
+0:01
25K
15.53 mi12:52:582:01:137:4819:23
8:00
+0:05
30K
18.64 mi13:18:312:26:467:5225:33
8:13
+0:13
20M
20.00 mi13:29:362:37:517:5411:05
8:09
-0:04
21M
21.00 mi13:37:592:46:147:558:23
8:23
+0:14
35K
21.75 mi13:43:542:52:097:555:55
7:55
-0:28
23M
23.00 mi13:53:433:01:587:559:49
7:50
-0:05
24M
24.00 mi14:01:203:09:357:547:37
7:37
-0:13
40K
24.85 mi14:07:513:16:067:536:31
7:37
0:00
25.2M
25.20 mi14:10:403:18:557:542:49
8:10
+0:33
Finish
26.22 mi14:17:573:26:127:527:17
7:09
-1:01

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:09 /mi

Average Pace

7:52 /mi

Slowest Pace

8:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:06

50% of race

Time at Steady Pace

1:43:06

50% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:52 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:15:0723:227:3123:22
7:31
#10956
10K
6.21 mi11:39:1747:327:3924:10
7:47
#11648
15K
9.32 mi12:03:371:11:527:4324:20
7:50
#11818
20K
12.43 mi12:28:111:36:267:4624:34
7:54
#11600
Half
13.11 mi12:33:351:41:507:465:24
7:55
#11619
25K
15.53 mi12:52:582:01:137:4819:23
8:00
#11301
30K
18.64 mi13:18:312:26:467:5225:33
8:13
#10768
20M
20.00 mi13:29:362:37:517:5411:05
8:09
#10448
21M
21.00 mi13:37:592:46:147:558:23
8:23
#10063
35K
21.75 mi13:43:542:52:097:555:55
7:55
#9911
23M
23.00 mi13:53:433:01:587:559:49
7:50
#9495
24M
24.00 mi14:01:203:09:357:547:37
7:37
#9202
40K
24.85 mi14:07:513:16:067:536:31
7:37
#8914
25.2M
25.20 mi14:10:403:18:557:542:49
8:10
#8745
Finish
26.22 mi14:17:573:26:127:527:17
7:09
#8459
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi109562536253612197(Top 48%)3353(Top 31%)3353(Top 72%)
10K6.21 mi3.10 mi11648-6922961-4252961-42512481(Top 49%)3460(Top 32%)3460(Top 74%)
15K9.32 mi3.11 mi11818-1703098-1373098-13712197(Top 48%)3353(Top 31%)3353(Top 72%)
20K12.43 mi3.11 mi11600+2182999+992999+9911176(Top 44%)2897(Top 27%)2897(Top 62%)
Half13.11 mi0.68 mi11619-193011-123011-1212148(Top 48%)3386(Top 31%)3386(Top 73%)
25K15.53 mi2.42 mi11301+3182888+1232888+12310157(Top 40%)2554(Top 23%)2554(Top 55%)
30K18.64 mi3.11 mi10768+5332701+1872701+1879143(Top 36%)2282(Top 21%)2282(Top 49%)
20M20.00 mi1.36 mi10448+3202600+1012600+1017621(Top 30%)1813(Top 17%)1813(Top 39%)
21M21.00 mi1.00 mi10063+3852466+1342466+1345718(Top 22%)1179(Top 11%)1179(Top 25%)
35K21.75 mi0.75 mi9911+1522423+432423+437244(Top 28%)1866(Top 17%)1866(Top 40%)
23M23.00 mi1.25 mi9495+4162284+1392284+1395020(Top 20%)1025(Top 9%)1025(Top 22%)
24M24.00 mi1.00 mi9202+2932180+1042180+1044647(Top 18%)947(Top 9%)947(Top 20%)
40K24.85 mi0.85 mi8914+2882084+962084+964025(Top 16%)802(Top 7%)802(Top 17%)
25.2M25.20 mi0.35 mi8745+1692035+492035+493351(Top 13%)601(Top 6%)601(Top 13%)
Finish26.22 mi1.02 mi8459+2861940+951940+953815(Top 15%)736(Top 7%)736(Top 16%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 48%
×21stories
+97ft-345ft

Overall

12197

Females

3353

F18-39

3353

5K→10K

3.1 - 6.2 mi

Top 49%
×5stories
+79ft-138ft

Overall

12481

Females

3460

F18-39

3460

10K→15K

6.2 - 9.3 mi

Top 48%
×3stories
+67ft-78ft

Overall

12197

Females

3353

F18-39

3353

15K→20K

9.3 - 12.4 mi

Top 44%
×5stories
+106ft-86ft

Overall

11176

Females

2897

F18-39

2897

20K→Half

12.4 - 13.1 mi

Top 48%
×2stories
+19ft-37ft

Overall

12148

Females

3386

F18-39

3386

Half→25K

13.1 - 15.5 mi

Top 40%
×4stories
+66ft-88ft

Overall

10157

Females

2554

F18-39

2554

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

9143

Females

2282

F18-39

2282

30K→20M

18.6 - 20.0 mi

Top 30%
×5stories
+64ft-50ft

Overall

7621

Females

1813

F18-39

1813

20M→21M

20.0 - 21.0 mi

Top 22%
×8stories
+106ft-24ft

Overall

5718

Females

1179

F18-39

1179

21M→35K

21.0 - 21.8 mi

Top 28%
×7stories
+17ft-86ft

Overall

7244

Females

1866

F18-39

1866

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5020

Females

1025

F18-39

1025

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

4647

Females

947

F18-39

947

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4025

Females

802

F18-39

802

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3351

Females

601

F18-39

601

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2stories
+22ft-21ft

Overall

3815

Females

736

F18-39

736

Passing Analysis

Category:
Athletes Passed
3944*
Passed By
1447
Net Change
+2497
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10956
5K10K100792-692#10956#11648
10K15K173343-170#11648#11818
15K20K335117+218#11818#11600
20KHalf3352-19#11600#11619
Half25K36345+318#11619#11301
25K30K59966+533#11301#10768
30K20M3299+320#10768#10448
20M21M3894+385#10448#10063
21M35K163*11+152#10063#9911
35K23M417*1+416#9911#9495
23M24M297*4+293#9495#9202
24M40K2891+288#9202#8914
40K25.2M1701+169#8914#8745
25.2MFinish2871+286#8745#8459
TOTALS3944*1447+2497

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing