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BOSTON MARATHON 2023

Szuyu Chiu

Bib: 10300 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 37%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 41%
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:12/mi
22:21
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:01/mi
44:10
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:10/mi
1:06:27
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:45/mi
1:30:32
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:12/mi
1:35:27
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:27/mi
1:53:31
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:59/mi
2:18:20
↑ 181↓ 1480.2%
138 ft elev
20M
7:54/mi
2:29:04
↑ 64↓ 500.2%
148 ft elev
21M
8:51/mi
2:37:55
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:42/mi
2:43:41
↑ 17↓ 861.7%
156 ft elev
23M
8:13/mi
2:53:58
↑ 23↓ 630.6%
116 ft elev
24M
8:20/mi
3:02:18
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:53/mi
3:09:54
↓ 200.3%
20 ft elev
25.2M
11:13/mi
3:13:46
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:42/mi
3:22:38
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:27
Pace7:17 /mi
2nd Half
Distance13.11 mi
Time1:47:11
Pace8:11 /mi
📊Positive Split: 12.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:3522:217:1222:21
7:12
-
10K
6.21 mi11:10:2444:107:0621:49
7:01
-0:11
15K
9.32 mi11:32:411:06:277:0822:17
7:10
+0:09
20K
12.43 mi11:56:461:30:327:1724:05
7:45
+0:35
Half
13.11 mi12:01:411:35:277:174:55
7:12
-0:33
25K
15.53 mi12:19:451:53:317:1818:04
7:27
+0:15
30K
18.64 mi12:44:342:18:207:2524:49
7:59
+0:32
20M
20.00 mi12:55:182:29:047:2710:44
7:54
-0:05
21M
21.00 mi13:04:092:37:557:318:51
8:51
+0:57
35K
21.75 mi13:09:552:43:417:325:46
7:42
-1:09
23M
23.00 mi13:20:122:53:587:3410:17
8:13
+0:31
24M
24.00 mi13:28:323:02:187:368:20
8:20
+0:07
40K
24.85 mi13:36:083:09:547:387:36
8:53
+0:33
25.2M
25.20 mi13:40:003:13:467:413:52
11:13
+2:20
Finish
26.22 mi13:48:523:22:387:448:52
8:42
-2:31

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

7:01 /mi

Average Pace

7:44 /mi

Slowest Pace

11:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:11:22

35% of race

Time at Steady Pace

1:42:05

50% of race

Time at Slower Pace

29:11

14% of race

Average Pace: 7:44 /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 mi10:48:3522:217:1222:21
7:12
#7458
10K
6.21 mi11:10:2444:107:0621:49
7:01
#7163
15K
9.32 mi11:32:411:06:277:0822:17
7:10
#7294
20K
12.43 mi11:56:461:30:327:1724:05
7:45
#8137
Half
13.11 mi12:01:411:35:277:174:55
7:12
#8125
25K
15.53 mi12:19:451:53:317:1818:04
7:27
#8121
30K
18.64 mi12:44:342:18:207:2524:49
7:59
#8526
20M
20.00 mi12:55:182:29:047:2710:44
7:54
#8585
21M
21.00 mi13:04:092:37:557:318:51
8:51
#8811
35K
21.75 mi13:09:552:43:417:325:46
7:42
#8838
23M
23.00 mi13:20:122:53:587:3410:17
8:13
#8952
24M
24.00 mi13:28:323:02:187:368:20
8:20
#9138
40K
24.85 mi13:36:083:09:547:387:36
8:53
#9376
25.2M
25.20 mi13:40:003:13:467:413:52
11:13
#9626
Finish
26.22 mi13:48:523:22:387:448:52
8:42
#9931
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi7458661966197612(Top 29%)6673(Top 44%)6673(Top 296%)
10K6.21 mi3.10 mi7163+2956378+2416378+2416974(Top 26%)6226(Top 41%)6226(Top 276%)
15K9.32 mi3.11 mi7294-1316471-936471-937612(Top 29%)6673(Top 44%)6673(Top 296%)
20K12.43 mi3.11 mi8137-8437032-5617032-56111302(Top 42%)8707(Top 57%)8707(Top 387%)
Half13.11 mi0.68 mi8125+127020+127020+127916(Top 30%)6864(Top 45%)6864(Top 305%)
25K15.53 mi2.42 mi8121+46986+346986+348421(Top 32%)7082(Top 47%)7082(Top 314%)
30K18.64 mi3.11 mi8526-4057207-2217207-22110784(Top 41%)8231(Top 54%)8231(Top 365%)
20M20.00 mi1.36 mi8585-597224-177224-179544(Top 36%)7497(Top 49%)7497(Top 333%)
21M21.00 mi1.00 mi8811-2267357-1337357-13312515(Top 47%)8799(Top 58%)8799(Top 391%)
35K21.75 mi0.75 mi8838-277358-17358-19961(Top 37%)7615(Top 50%)7615(Top 338%)
23M23.00 mi1.25 mi8952-1147393-357393-3511242(Top 42%)8091(Top 53%)8091(Top 359%)
24M24.00 mi1.00 mi9138-1867475-827475-8213392(Top 50%)9034(Top 60%)9034(Top 401%)
40K24.85 mi0.85 mi9376-2387585-1107585-11015512(Top 58%)9895(Top 65%)9895(Top 439%)
25.2M25.20 mi0.35 mi9626-2507714-1297714-12920897(Top 78%)12330(Top 81%)12330(Top 548%)
Finish26.22 mi1.02 mi9931-3057853-1397853-13916460(Top 62%)10357(Top 68%)10357(Top 460%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21story building
+97ft-345ft

Overall

7612

Males

6673

M45-49

6673

5K→10K

3.1 - 6.2 mi

Top 26%
×5story building
+79ft-138ft

Overall

6974

Males

6226

M45-49

6226

10K→15K

6.2 - 9.3 mi

Top 29%
×3story building
+67ft-78ft

Overall

7612

Males

6673

M45-49

6673

15K→20K

9.3 - 12.4 mi

Top 42%
×5story building
+106ft-86ft

Overall

11302

Males

8707

M45-49

8707

20K→Half

12.4 - 13.1 mi

Top 30%
×2story building
+19ft-37ft

Overall

7916

Males

6864

M45-49

6864

Half→25K

13.1 - 15.5 mi

Top 32%
×4story building
+66ft-88ft

Overall

8421

Males

7082

M45-49

7082

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

10784

Males

8231

M45-49

8231

30K→20M

18.6 - 20.0 mi

Top 36%
×5story building
+64ft-50ft

Overall

9544

Males

7497

M45-49

7497

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

12515

Males

8799

M45-49

8799

21M→35K

21.0 - 21.8 mi

Top 37%
×7story building
+17ft-86ft

Overall

9961

Males

7615

M45-49

7615

35K→23M

21.8 - 23.0 mi

Top 42%
×5story building
+23ft-63ft

Overall

11242

Males

8091

M45-49

8091

23M→24M

23.0 - 24.0 mi

Top 50%
×6story building
+12ft-82ft

Overall

13392

Males

9034

M45-49

9034

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15512

Males

9895

M45-49

9895

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

20897

Males

12330

M45-49

12330

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

16460

Males

10357

M45-49

10357

Passing Analysis

Category:
Athletes Passed
904
Passed By
3377
Net Change
-2473
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7458
5K → 10K39398+295#7458#7163
10K → 15K81212-131#7163#7294
15K → 20K11854-843#7294#8137
20K → Half3018+12#8137#8125
Half → 25K10298+4#8125#8121
25K → 30K60465-405#8121#8526
30K → 20M63122-59#8526#8585
20M → 21M28254-226#8585#8811
21M → 35K3461-27#8811#8838
35K → 23M42156-114#8838#8952
23M → 24M24210-186#8952#9138
24M → 40K19257-238#9138#9376
40K → 25.2M4254-250#9376#9626
25.2M → Finish13318-305#9626#9931
TOTALS9043377-2473
📊

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