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BOSTON MARATHON 2024

Xiangdong Chi

Bib: 17443•M

GA

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Gender (Male)
#0 / 14578
Masters (Masters Men)
#0 / 9729
Division (M55-59)
#0 / 1529
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:45
Rank: #16579
Start → 5K
8:17/mi
25:45 split
10K· 6.21 mi
53:17
Rank: #17939 (-1360)
5K → 10K
8:52/mi
27:32 split
15K· 9.32 mi
1:20:31
Rank: #17870 (+69)
10K → 15K
8:46/mi
27:14 split
20K· 12.43 mi
1:48:29
Rank: #17664 (+206)
15K → 20K
9:00/mi
27:58 split
Half· 13.11 mi
1:55:28
Rank: #18029 (-365)
20K → Half
10:14/mi
6:59 split
25K· 15.53 mi
2:18:38
Rank: #17942 (+87)
Half → 25K
9:33/mi
23:10 split
30K· 18.64 mi
2:49:58
Rank: #17897 (+45)
25K → 30K
10:05/mi
31:20 split
20M
3:04:08
Rank: #17915 (-18)
30K → 20M
10:25/mi
14:10 split
21M
3:15:43
Rank: #17936 (-21)
20M → 21M
11:35/mi
11:35 split
35K· 21.75 mi
3:23:14
Rank: #17908 (+28)
21M → 35K
10:03/mi
7:31 split
23M
3:38:39
Rank: #18173 (-265)
35K → 23M
12:19/mi
15:25 split
24M
3:49:11
Rank: #18167 (+6)
23M → 24M
10:32/mi
10:32 split
40K· 24.85 mi
3:59:32
Rank: #18263 (-96)
24M → 40K
12:06/mi
10:21 split
25.2M
4:05:35
Rank: #18489 (-226)
40K → 25.2M
17:33/mi
6:03 split
Finish· 26.22 mi
4:16:55
Rank: #18599 (-110)
25.2M → Finish
11:07/mi
11:20 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:28
Pace8:48 /mi
2nd Half
Distance13.11 mi
Time2:21:27
Pace10:47 /mi
📊Positive Split: 22.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:5825:458:1725:45
8:17
-
10K
6.21 mi11:44:3053:178:3527:32
8:52
+0:35
15K
9.32 mi12:11:441:20:318:3827:14
8:46
-0:06
20K
12.43 mi12:39:421:48:298:4427:58
9:00
+0:14
Half
13.11 mi12:46:411:55:288:486:59
10:14
+1:14
25K
15.53 mi13:09:512:18:388:5523:10
9:33
-0:41
30K
18.64 mi13:41:112:49:589:0731:20
10:05
+0:32
20M
20.00 mi13:55:213:04:089:1214:10
10:25
+0:20
21M
21.00 mi14:06:563:15:439:1911:35
11:35
+1:10
35K
21.75 mi14:14:273:23:149:217:31
10:03
-1:32
23M
23.00 mi14:29:523:38:399:3015:25
12:19
+2:16
24M
24.00 mi14:40:243:49:119:3310:32
10:32
-1:47
40K
24.85 mi14:50:453:59:329:3810:21
12:06
+1:34
25.2M
25.20 mi14:56:484:05:359:456:03
17:33
+5:27
Finish
26.22 mi15:08:084:16:559:4811:20
11:07
-6:26

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

8:17 /mi

Average Pace

9:48 /mi

Slowest Pace

17:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:29

42% of race

Time at Steady Pace

1:45:02

41% of race

Time at Slower Pace

43:24

17% of race

Average Pace: 9:48 /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 mi11:16:5825:458:1725:45
8:17
#16579
10K
6.21 mi11:44:3053:178:3527:32
8:52
#17939
15K
9.32 mi12:11:441:20:318:3827:14
8:46
#17870
20K
12.43 mi12:39:421:48:298:4427:58
9:00
#17664
Half
13.11 mi12:46:411:55:288:486:59
10:14
#18029
25K
15.53 mi13:09:512:18:388:5523:10
9:33
#17942
30K
18.64 mi13:41:112:49:589:0731:20
10:05
#17897
20M
20.00 mi13:55:213:04:089:1214:10
10:25
#17915
21M
21.00 mi14:06:563:15:439:1911:35
11:35
#17936
35K
21.75 mi14:14:273:23:149:217:31
10:03
#17908
23M
23.00 mi14:29:523:38:399:3015:25
12:19
#18173
24M
24.00 mi14:40:243:49:119:3310:32
10:32
#18167
40K
24.85 mi14:50:453:59:329:3810:21
12:06
#18263
25.2M
25.20 mi14:56:484:05:359:456:03
17:33
#18489
Finish
26.22 mi15:08:084:16:559:4811:20
11:07
#18599
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi16579106301063017800(Top 70%)11165(Top 77%)11165(Top 730%)
10K6.21 mi3.10 mi17939-136011197-56711197-56719158(Top 75%)11740(Top 81%)11740(Top 768%)
15K9.32 mi3.11 mi17870+6911173+2411173+2417800(Top 70%)11165(Top 77%)11165(Top 730%)
20K12.43 mi3.11 mi17664+20611073+10011073+10017330(Top 68%)10957(Top 75%)10957(Top 717%)
Half13.11 mi0.68 mi18029-36511232-15911232-15922053(Top 86%)13008(Top 89%)13008(Top 851%)
25K15.53 mi2.42 mi17942+8711163+6911163+6917731(Top 69%)11025(Top 76%)11025(Top 721%)
30K18.64 mi3.11 mi17897+4511080+8311080+8317615(Top 69%)10730(Top 74%)10730(Top 702%)
20M20.00 mi1.36 mi17915-1811061+1911061+1917767(Top 70%)10641(Top 73%)10641(Top 696%)
21M21.00 mi1.00 mi17936-2111038+2311038+2317852(Top 70%)10561(Top 72%)10561(Top 691%)
35K21.75 mi0.75 mi17908+2811008+3011008+3017301(Top 68%)10270(Top 70%)10270(Top 672%)
23M23.00 mi1.25 mi18173-26511115-10711115-10721345(Top 84%)12248(Top 84%)12248(Top 801%)
24M24.00 mi1.00 mi18167+611080+3511080+3517939(Top 70%)10468(Top 72%)10468(Top 685%)
40K24.85 mi0.85 mi18263-9611111-3111111-3120644(Top 81%)11779(Top 81%)11779(Top 770%)
25.2M25.20 mi0.35 mi18489-22611206-9511206-9524856(Top 97%)14104(Top 97%)14104(Top 922%)
Finish26.22 mi1.02 mi18599-11011226-2011226-2021638(Top 85%)12311(Top 84%)12311(Top 805%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

17800

Males

11165

M55-59

11165

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

19158

Males

11740

M55-59

11740

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

17800

Males

11165

M55-59

11165

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

17330

Males

10957

M55-59

10957

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

22053

Males

13008

M55-59

13008

Half→25K

13.1 - 15.5 mi

Top 69%
×4story building
+66ft-88ft

Overall

17731

Males

11025

M55-59

11025

25K→30K

15.5 - 18.6 mi

Top 69%
×9story building
+181ft-148ft

Overall

17615

Males

10730

M55-59

10730

30K→20M

18.6 - 20.0 mi

Top 70%
×5story building
+64ft-50ft

Overall

17767

Males

10641

M55-59

10641

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

17852

Males

10561

M55-59

10561

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

17301

Males

10270

M55-59

10270

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

21345

Males

12248

M55-59

12248

23M→24M

23.0 - 24.0 mi

Top 70%
×6story building
+12ft-82ft

Overall

17939

Males

10468

M55-59

10468

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

20644

Males

11779

M55-59

11779

40K→25.2M

24.9 - 25.2 mi

Top 97%
×1story
+13ft-16ft

Overall

24856

Males

14104

M55-59

14104

25.2M→Finish

25.2 - 26.2 mi

Top 85%
×2story building
+22ft-21ft

Overall

21638

Males

12311

M55-59

12311

Passing Analysis

Category:
Athletes Passed
1668
Passed By
3688
Net Change
-2020
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16579
5K → 10K401400-1360#16579#17939
10K → 15K263194+69#17939#17870
15K → 20K351145+206#17870#17664
20K → Half3368-365#17664#18029
Half → 25K248161+87#18029#17942
25K → 30K277232+45#17942#17897
30K → 20M110128-18#17897#17915
20M → 21M96117-21#17915#17936
21M → 35K7143+28#17936#17908
35K → 23M49314-265#17908#18173
23M → 24M7367+6#18173#18167
24M → 40K36132-96#18167#18263
40K → 25.2M9235-226#18263#18489
25.2M → Finish42152-110#18489#18599
TOTALS16683688-2020
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing