Boston Marathon logo
BOSTON MARATHON 2023

Rory Liu

Bib: 32148•M

WA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:51
Rank: #22397
Start → 5K
29:51 | 9:36/mi
10K· 6.21 mi
59:41
Rank: #22620 (-223)
5K → 10K
29:50 | 9:36/mi
15K· 9.32 mi
1:28:11
Rank: #22178 (+442)
10K → 15K
28:30 | 9:10/mi
20K· 12.43 mi
1:57:49
Rank: #22045 (+133)
15K → 20K
29:38 | 9:32/mi
Half· 13.11 mi
2:04:07
Rank: #22000 (+45)
20K → Half
6:18 | 9:14/mi
25K· 15.53 mi
2:26:53
Rank: #21746 (+254)
Half → 25K
22:46 | 9:23/mi
30K· 18.64 mi
2:59:11
Rank: #21786 (-40)
25K → 30K
32:18 | 10:24/mi
20M
3:13:34
Rank: #21809 (-23)
30K → 20M
14:23 | 10:35/mi
21M
3:24:58
Rank: #21821 (-12)
20M → 21M
11:24 | 11:24/mi
35K· 21.75 mi
3:32:37
Rank: #21835 (-14)
21M → 35K
7:39 | 10:14/mi
23M
3:45:44
Rank: #21791 (+44)
35K → 23M
13:07 | 10:29/mi
24M
3:56:26
Rank: #21825 (-34)
23M → 24M
10:42 | 10:42/mi
40K· 24.85 mi
4:05:14
Rank: #21778 (+47)
24M → 40K
8:48 | 10:18/mi
25.2M
4:09:04
Rank: #21760 (+18)
40K → 25.2M
3:50 | 11:07/mi
Finish· 26.22 mi
4:18:38
Rank: #21696 (+64)
25.2M → Finish
9:34 | 9:23/mi

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
Time2:04:07
Pace9:28 /mi
2nd Half
Distance13.11 mi
Time2:14:31
Pace10:16 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:3929:519:3629:51
9:36
-
10K
6.21 mi12:23:2959:419:3629:50
9:36
0:00
15K
9.32 mi12:51:591:28:119:2828:30
9:10
-0:26
20K
12.43 mi13:21:371:57:499:2929:38
9:32
+0:22
Half
13.11 mi13:27:552:04:079:286:18
9:14
-0:18
25K
15.53 mi13:50:412:26:539:2722:46
9:23
+0:09
30K
18.64 mi14:22:592:59:119:3732:18
10:24
+1:01
20M
20.00 mi14:37:223:13:349:4114:23
10:35
+0:11
21M
21.00 mi14:48:463:24:589:4611:24
11:24
+0:49
35K
21.75 mi14:56:253:32:379:477:39
10:14
-1:10
23M
23.00 mi15:09:323:45:449:4913:07
10:29
+0:15
24M
24.00 mi15:20:143:56:269:5110:42
10:42
+0:13
40K
24.85 mi15:29:024:05:149:528:48
10:18
-0:24
25.2M
25.20 mi15:32:524:09:049:533:50
11:07
+0:49
Finish
26.22 mi15:42:264:18:389:529:34
9:23
-1:44

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

9:10 /mi

Average Pace

9:52 /mi

Slowest Pace

11:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:36:27

60% of race

Time at Steady Pace

1:01:52

24% of race

Time at Slower Pace

40:19

16% of race

Average Pace: 9:52 /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 mi11:53:3929:519:3629:51
9:36
#22397
10K
6.21 mi12:23:2959:419:3629:50
9:36
#22620
15K
9.32 mi12:51:591:28:119:2828:30
9:10
#22178
20K
12.43 mi13:21:371:57:499:2929:38
9:32
#22045
Half
13.11 mi13:27:552:04:079:286:18
9:14
#22000
25K
15.53 mi13:50:412:26:539:2722:46
9:23
#21746
30K
18.64 mi14:22:592:59:119:3732:18
10:24
#21786
20M
20.00 mi14:37:223:13:349:4114:23
10:35
#21809
21M
21.00 mi14:48:463:24:589:4611:24
11:24
#21821
35K
21.75 mi14:56:253:32:379:477:39
10:14
#21835
23M
23.00 mi15:09:323:45:449:4913:07
10:29
#21791
24M
24.00 mi15:20:143:56:269:5110:42
10:42
#21825
40K
24.85 mi15:29:024:05:149:528:48
10:18
#21778
25.2M
25.20 mi15:32:524:09:049:533:50
11:07
#21760
Finish
26.22 mi15:42:264:18:389:529:34
9:23
#21696
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi22397133041330421208(Top 80%)12845(Top 85%)12845(Top 243%)
10K6.21 mi3.10 mi22620-22313438-13413438-13422803(Top 86%)13547(Top 89%)13547(Top 256%)
15K9.32 mi3.11 mi22178+44213231+20713231+20721208(Top 80%)12845(Top 85%)12845(Top 243%)
20K12.43 mi3.11 mi22045+13313160+7113160+7121671(Top 81%)13040(Top 86%)13040(Top 247%)
Half13.11 mi0.68 mi22000+4513145+1513145+1521259(Top 80%)12852(Top 85%)12852(Top 243%)
25K15.53 mi2.42 mi21746+25413044+10113044+10120481(Top 77%)12487(Top 82%)12487(Top 236%)
30K18.64 mi3.11 mi21786-4013051-713051-721984(Top 83%)13063(Top 86%)13063(Top 247%)
20M20.00 mi1.36 mi21809-2313050+113050+121922(Top 82%)12963(Top 85%)12963(Top 245%)
21M21.00 mi1.00 mi21821-1213048+213048+221682(Top 81%)12839(Top 85%)12839(Top 243%)
35K21.75 mi0.75 mi21835-1413040+813040+821828(Top 82%)12855(Top 85%)12855(Top 243%)
23M23.00 mi1.25 mi21791+4413004+3613004+3621255(Top 80%)12581(Top 83%)12581(Top 238%)
24M24.00 mi1.00 mi21825-3413015-1113015-1122446(Top 84%)13083(Top 86%)13083(Top 248%)
40K24.85 mi0.85 mi21778+4712978+3712978+3720711(Top 78%)12246(Top 81%)12246(Top 232%)
25.2M25.20 mi0.35 mi21760+1812964+1412964+1420707(Top 78%)12258(Top 81%)12258(Top 232%)
Finish26.22 mi1.02 mi21696+6412934+3012934+3019710(Top 74%)11851(Top 78%)11851(Top 224%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21stories
+97ft-345ft

Overall

21208

Males

12845

M18-39

12845

5K→10K

3.1 - 6.2 mi

Top 86%
×5stories
+79ft-138ft

Overall

22803

Males

13547

M18-39

13547

10K→15K

6.2 - 9.3 mi

Top 80%
×3stories
+67ft-78ft

Overall

21208

Males

12845

M18-39

12845

15K→20K

9.3 - 12.4 mi

Top 81%
×5stories
+106ft-86ft

Overall

21671

Males

13040

M18-39

13040

20K→Half

12.4 - 13.1 mi

Top 80%
×2stories
+19ft-37ft

Overall

21259

Males

12852

M18-39

12852

Half→25K

13.1 - 15.5 mi

Top 77%
×4stories
+66ft-88ft

Overall

20481

Males

12487

M18-39

12487

25K→30K

15.5 - 18.6 mi

Top 83%
×9stories
+181ft-148ft

Overall

21984

Males

13063

M18-39

13063

30K→20M

18.6 - 20.0 mi

Top 82%
×5stories
+64ft-50ft

Overall

21922

Males

12963

M18-39

12963

20M→21M

20.0 - 21.0 mi

Top 81%
×8stories
+106ft-24ft

Overall

21682

Males

12839

M18-39

12839

21M→35K

21.0 - 21.8 mi

Top 82%
×7stories
+17ft-86ft

Overall

21828

Males

12855

M18-39

12855

35K→23M

21.8 - 23.0 mi

Top 80%
×5stories
+23ft-63ft

Overall

21255

Males

12581

M18-39

12581

23M→24M

23.0 - 24.0 mi

Top 84%
×6stories
+12ft-82ft

Overall

22446

Males

13083

M18-39

13083

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

20711

Males

12246

M18-39

12246

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

20707

Males

12258

M18-39

12258

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2stories
+22ft-21ft

Overall

19710

Males

11851

M18-39

11851

Passing Analysis

Category:
Athletes Passed
1658
Passed By
957
Net Change
+701
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22397
5K → 10K140363-223#22397#22620
10K → 15K45816+442#22620#22178
15K → 20K20774+133#22178#22045
20K → Half527+45#22045#22000
Half → 25K26713+254#22000#21746
25K → 30K132172-40#21746#21786
30K → 20M5881-23#21786#21809
20M → 21M5365-12#21809#21821
21M → 35K2842-14#21821#21835
35K → 23M8541+44#21835#21791
23M → 24M2155-34#21791#21825
24M → 40K5912+47#21825#21778
40K → 25.2M3012+18#21778#21760
25.2M → Finish684+64#21760#21696
TOTALS1658957+701
📊

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