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BOSTON MARATHON 2023

Nao Terai

Bib: 13697•F

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 38%
Gender (Female)
#0 / 11423
Top 19%
Masters (Masters Women)
#0 / 6539
Top 8%
Division (F40-44)
#0 / 1878
Top 17%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:33
Rank: #7864
Start → 5K
22:33 | 7:15/mi
10K· 6.21 mi
44:44
Rank: #7768 (+96)
5K → 10K
22:11 | 7:08/mi
15K· 9.32 mi
1:07:26
Rank: #8015 (-247)
10K → 15K
22:42 | 7:18/mi
20K· 12.43 mi
1:30:48
Rank: #8305 (-290)
15K → 20K
23:22 | 7:31/mi
Half· 13.11 mi
1:35:45
Rank: #8291 (+14)
20K → Half
4:57 | 7:15/mi
25K· 15.53 mi
1:54:09
Rank: #8429 (-138)
Half → 25K
18:24 | 7:35/mi
30K· 18.64 mi
2:19:08
Rank: #8865 (-436)
25K → 30K
24:59 | 8:02/mi
20M
2:30:25
Rank: #9112 (-247)
30K → 20M
11:17 | 8:18/mi
21M
2:39:27
Rank: #9369 (-257)
20M → 21M
9:02 | 9:02/mi
35K· 21.75 mi
2:45:14
Rank: #9379 (-10)
21M → 35K
5:47 | 7:44/mi
23M
2:55:52
Rank: #9587 (-208)
35K → 23M
10:38 | 8:30/mi
24M
3:04:13
Rank: #9739 (-152)
23M → 24M
8:21 | 8:21/mi
40K· 24.85 mi
3:11:29
Rank: #9874 (-135)
24M → 40K
7:16 | 8:30/mi
25.2M
3:14:42
Rank: #9938 (-64)
40K → 25.2M
3:13 | 9:20/mi
Finish· 26.22 mi
3:23:11
Rank: #10097 (-159)
25.2M → Finish
8:29 | 8:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:45
Pace7:18 /mi
2nd Half
Distance13.11 mi
Time1:47:26
Pace8:12 /mi
📊Positive Split: 12.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:0422:337:1522:33
7:15
-
10K
6.21 mi11:13:1544:447:1222:11
7:08
-0:07
15K
9.32 mi11:35:571:07:267:1422:42
7:18
+0:10
20K
12.43 mi11:59:191:30:487:1823:22
7:31
+0:13
Half
13.11 mi12:04:161:35:457:184:57
7:15
-0:16
25K
15.53 mi12:22:401:54:097:2118:24
7:35
+0:20
30K
18.64 mi12:47:392:19:087:2824:59
8:02
+0:27
20M
20.00 mi12:58:562:30:257:3111:17
8:18
+0:16
21M
21.00 mi13:07:582:39:277:369:02
9:02
+0:44
35K
21.75 mi13:13:452:45:147:365:47
7:44
-1:18
23M
23.00 mi13:24:232:55:527:3910:38
8:30
+0:46
24M
24.00 mi13:32:443:04:137:418:21
8:21
-0:09
40K
24.85 mi13:40:003:11:297:427:16
8:30
+0:09
25.2M
25.20 mi13:43:133:14:427:443:13
9:20
+0:50
Finish
26.22 mi13:51:423:23:117:458:29
8:19
-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

7:08 /mi

Average Pace

7:45 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:54:09

56% of race

Time at Steady Pace

58:53

29% of race

Time at Slower Pace

30:09

15% of race

Average Pace: 7:45 /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 mi10:51:0422:337:1522:33
7:15
#7864
10K
6.21 mi11:13:1544:447:1222:11
7:08
#7768
15K
9.32 mi11:35:571:07:267:1422:42
7:18
#8015
20K
12.43 mi11:59:191:30:487:1823:22
7:31
#8305
Half
13.11 mi12:04:161:35:457:184:57
7:15
#8291
25K
15.53 mi12:22:401:54:097:2118:24
7:35
#8429
30K
18.64 mi12:47:392:19:087:2824:59
8:02
#8865
20M
20.00 mi12:58:562:30:257:3111:17
8:18
#9112
21M
21.00 mi13:07:582:39:277:369:02
9:02
#9369
35K
21.75 mi13:13:452:45:147:365:47
7:44
#9379
23M
23.00 mi13:24:232:55:527:3910:38
8:30
#9587
24M
24.00 mi13:32:443:04:137:418:21
8:21
#9739
40K
24.85 mi13:40:003:11:297:427:16
8:30
#9874
25.2M
25.20 mi13:43:133:14:427:443:13
9:20
#9938
Finish
26.22 mi13:51:423:23:117:458:29
8:19
#10097
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi78649739738637(Top 32%)1296(Top 11%)1296(Top 69%)
10K6.21 mi3.10 mi7768+96939+34939+347708(Top 29%)964(Top 8%)964(Top 51%)
15K9.32 mi3.11 mi8015-2471043-1041043-1048637(Top 32%)1296(Top 11%)1296(Top 69%)
20K12.43 mi3.11 mi8305-2901161-1181161-1189488(Top 36%)1687(Top 15%)1687(Top 90%)
Half13.11 mi0.68 mi8291+141154+71154+78338(Top 31%)1243(Top 11%)1243(Top 66%)
25K15.53 mi2.42 mi8429-1381232-781232-789480(Top 36%)1771(Top 16%)1771(Top 94%)
30K18.64 mi3.11 mi8865-4361433-2011433-20111234(Top 42%)2752(Top 24%)2752(Top 147%)
20M20.00 mi1.36 mi9112-2471556-1231556-12312384(Top 47%)3502(Top 31%)3502(Top 186%)
21M21.00 mi1.00 mi9369-2571679-1231679-12313602(Top 51%)4258(Top 37%)4258(Top 227%)
35K21.75 mi0.75 mi9379-101703-241703-2410177(Top 38%)2446(Top 21%)2446(Top 130%)
23M23.00 mi1.25 mi9587-2081815-1121815-11213167(Top 49%)4152(Top 36%)4152(Top 221%)
24M24.00 mi1.00 mi9739-1521907-921907-9213539(Top 51%)4408(Top 39%)4408(Top 235%)
40K24.85 mi0.85 mi9874-1352005-982005-9813335(Top 50%)4371(Top 38%)4371(Top 233%)
25.2M25.20 mi0.35 mi9938-642052-472052-4714323(Top 54%)4893(Top 43%)4893(Top 261%)
Finish26.22 mi1.02 mi10097-1592147-952147-9514255(Top 54%)4867(Top 43%)4867(Top 259%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21stories
+97ft-345ft

Overall

8637

Females

1296

F40-44

1296

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

7708

Females

964

F40-44

964

10K→15K

6.2 - 9.3 mi

Top 32%
×3stories
+67ft-78ft

Overall

8637

Females

1296

F40-44

1296

15K→20K

9.3 - 12.4 mi

Top 36%
×5stories
+106ft-86ft

Overall

9488

Females

1687

F40-44

1687

20K→Half

12.4 - 13.1 mi

Top 31%
×2stories
+19ft-37ft

Overall

8338

Females

1243

F40-44

1243

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

9480

Females

1771

F40-44

1771

25K→30K

15.5 - 18.6 mi

Top 42%
×9stories
+181ft-148ft

Overall

11234

Females

2752

F40-44

2752

30K→20M

18.6 - 20.0 mi

Top 47%
×5stories
+64ft-50ft

Overall

12384

Females

3502

F40-44

3502

20M→21M

20.0 - 21.0 mi

Top 51%
×8stories
+106ft-24ft

Overall

13602

Females

4258

F40-44

4258

21M→35K

21.0 - 21.8 mi

Top 38%
×7stories
+17ft-86ft

Overall

10177

Females

2446

F40-44

2446

35K→23M

21.8 - 23.0 mi

Top 49%
×5stories
+23ft-63ft

Overall

13167

Females

4152

F40-44

4152

23M→24M

23.0 - 24.0 mi

Top 51%
×6stories
+12ft-82ft

Overall

13539

Females

4408

F40-44

4408

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

13335

Females

4371

F40-44

4371

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

14323

Females

4893

F40-44

4893

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2stories
+22ft-21ft

Overall

14255

Females

4867

F40-44

4867

Passing Analysis

Category:
Athletes Passed
806
Passed By
3038
Net Change
-2233
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7864
5K → 10K280184+96#7864#7768
10K → 15K52299-247#7768#8015
15K → 20K59349-290#8015#8305
20K → Half2410+14#8305#8291
Half → 25K69207-138#8291#8429
25K → 30K69505-436#8429#8865
30K → 20M30277-247#8865#9112
20M → 21M24281-257#9112#9369
21M → 35K4555-10#9369#9379
35K → 23M43251-208#9379#9587
23M → 24M28180-152#9587#9739
24M → 40K36171-135#9739#9874
40K → 25.2M1478-64#9874#9938
25.2M → Finish33191-159#9938#10097
TOTALS8063038-2233
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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